The solution to the differential equation is: r(t) = ⟨1/100 e10t - t2 + 119/10 t + 49/100, 1/12 t4 - 1/2 t2 - 13/3 t - 1/3, 1/2 t2 - 12 t + 26/5 ⟩, for t ≥ 0.
The differential equation for r′′(t) = ⟨e10t − 10, t2 − 1, 1⟩ with the initial conditions r(1) = ⟨0, 0, 5⟩, r′(1) = ⟨12, 0, 0⟩ can be solved using the following method:
Solve for the position vector r(t) using the acceleration vector a(t).
Then solve for the velocity vector r′(t) using the initial velocity. Finally, solve for r(t) using the initial position vector.1.
Solve for r(t) using a(t)
Integrate a(t) with respect to t two times to get r(t):a(t) = ⟨e10t − 10, t2 − 1, 1⟩
Integrating once will give the velocity: v(t) = ∫a(t) dt = ⟨ 1/10 e10t - 10t + C1 , 1/3 t3 - t + C2, t + C3 ⟩
Integrating again will give the position: r(t) = ∫v(t) dt = ⟨ 1/100 e10t - t2 + C1t + C4 , 1/12 t4 - 1/2 t2 + C2t + C5, 1/2 t2 + C3t + C6 ⟩2.
Solve for C1, C2, and C3 using initial velocity r′(1) = ⟨12, 0, 0⟩ = v(1)C1 = 119/10, C2 = -13/3, C3 = -12.3.
Solve for C4, C5, and C6 using initial position r(1) = ⟨0, 0, 5⟩ = r(1)C4 = 49/100, C5 = -1/3, C6 = 26/5
Therefore, the solution to the differential equation is: r(t) = ⟨1/100 e10t - t2 + 119/10 t + 49/100, 1/12 t4 - 1/2 t2 - 13/3 t - 1/3, 1/2 t2 - 12 t + 26/5 ⟩, for t ≥ 0.
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A city receives an average of 123.7 more millimeters of rain than a second city. The second city receives an average of 224.8 millimeters annually. How much rain does the first city receive on average each year?
The average amount of rainfall that the first city receives is 348.5 mm per year. To get this, you must first find the total rainfall of the first city and then divide it by the number of years. The total rainfall is calculated by adding the rainfall of the second city and the extra rainfall that the first city receives.
Given, The second city receives an average of 224.8 millimeters annually. A city receives an average of 123.7 more millimeters of rain than the second city. In order to find how much rain does the first city receive on average each year, we need to follow the below steps:
Step 1: Find the total amount of rain that the first city receives per year. Add 123.7 mm of rain received by the first city to 224.8 mm received by the second city. Therefore, total rain received by the first city = 123.7 + 224.8 = 348.5 mm
Step 2: Divide the total amount of rain by the number of years (since the average is taken annually).Therefore, the amount of rain the first city receives on average each year is:348.5 mm / 1 year = 348.5 mm/ year.
So, the average amount of rainfall that the first city receives is 348.5 mm per year. To get this, you must first find the total rainfall of the first city and then divide it by the number of years. The total rainfall is calculated by adding the rainfall of the second city and the extra rainfall that the first city receives.
The second city receives an average of 224.8 millimeters annually. We can assume that this is the average rainfall that the cities in the area receive, making the problem easier to solve. The first city receives an average of 123.7 mm more rain than the second city, which means that the first city receives 224.8 + 123.7 = 348.5 mm of rain each year.
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Area. Suppose the area of a circle is decreasing at a rate of2m²/sec, the rate of change of the radius when the area is 12m² equals 6.1400 m/s 150.7964 m/s -6.1400 m/s -150.7964 m/s -0.1629 m/s 0.1629 m/s
The rate of change of the radius of a circle when the area is 12m² is -0.1629 m/s. This means that the radius is decreasing at a rate of 0.1629 meters per second. The rate of change of the radius of a circle is equal to the negative of the rate of change of the area divided by 2πr.
In this case, the rate of change of the area is given as 2m²/sec, and the current area is 12m². So, the rate of change of the radius is equal to:
-2/(2π*12) = -0.1629 m/s
This means that the radius is decreasing at a rate of 0.1629 meters per second.
The negative sign indicates that the radius is decreasing. This is because the area of the circle is decreasing, so the radius must also be decreasing in order to keep the area constant.
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let f(x) = cx ln(cos x). for what value of c is f '(/4) = 1? c =
The value of c for which f '(/4) = 1 in the function f(x) = cx ln(cos x) is approximately c = -2.
To find the value of c, we first need to calculate the derivative of f(x) with respect to x. Using the product rule and the chain rule, we obtain:
f '(x) = c ln(cos x) - cx tan(x).
Next, we substitute x = π/4 into f '(x) and set it equal to 1:
f '(/4) = c ln(cos(/4)) - c(/4) tan(/4) = 1.
Simplifying the equation, we have:
c ln(√2/2) - c(1/4) = 1.
ln(√2/2) can be simplified to ln(1/√2) = -ln(√2) = -ln(2^(1/2)) = -(1/2) ln(2).
Now, rearranging the equation and solving for c:
c ln(2) = -1 + c/4.
c(ln(2) - 1/4) = -1.
c = -4/(4ln(2) - 1).
Calculating the approximate value, c ≈ -2.
Therefore, the value of c for which f '(/4) = 1 in the function f(x) = cx ln(cos x) is approximately c = -2.
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Use the inner product ⟨p,q⟩=a0b0+a1b1+a2b2 to find ⟨p,q⟩,∥p∥,∥q∥, and d(p,q) for the polynomials in P2. p(x)=2−x+3x2,q(x)=x−x2 (a) ⟨p,q⟩ x (b) ∥p∥ x (c) ∥q∥ (d) d(p,q)
The given inner product is: [tex]$⟨p,q⟩=a_0b_0+a_1b_1+a_2b_2$[/tex]Therefore, d(,)=18 So correct answer is D
To find the inner product, [tex]∥∥,∥∥,[/tex] and d(,) for the polynomials in P2.()=2−+32, ()=−2,
we have to use the given inner product as follows:(a) The inner product [tex]$⟨,⟩=a_0b_0+a_1b_1+a_2b_2=2(0)+(-1)(1)+(3)(-1)= -1$[/tex]
Therefore, ⟨,⟩=−1(
b) The norm of p, [tex]$∥∥=\sqrt{⟨,⟩}=\sqrt{2^2+(-1)^2+3^2}= \sqrt{14}$[/tex]
Therefore, ∥∥=14
(c)The norm of q, [tex]$∥∥=\sqrt{⟨,⟩}=\sqrt{1^2+(-1)^2}= \sqrt{2}$[/tex]
Therefore, [tex]∥∥=2(d)[/tex]
The distance between p and q, [tex]$d(,)=∥−∥=\sqrt{⟨−,−⟩}=\sqrt{⟨,⟩−2⟨,⟩+⟨,⟩}=\sqrt{14+2+2}= \sqrt{18}$[/tex]
Therefore, d(,)=18
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Part A Tives \( \mathrm{C} / 10 \) Tries \( 0 y+0 \) Part What mass \( \pi \) ise be hang from this and of the string to product five boos of a stansing =tve? Trier \( 0 / 49 \)
A simple and straightforward method to solve the given problem is using the formula of force and acceleration of gravity.
Here's the working,
The acceleration due to gravity is 9.8 m/s².
Therefore, the force exerted on the mass is given by,
F = mg where F is force, m is mass and g is acceleration due to gravity
Substituting the given values we get,
F = (5 × 9.8) N= 49 N
The tension in the string is equal to the force exerted by the mass hanging at the end of the string.
Therefore,T = 49 N
In conclusion, we have learned that to find the tension in a string, we need to determine the force that is pulling on it. This is often the weight of an object that is hanging from the string, which we can calculate using the formula for the force of gravity. Once we know the force, we can use the formula for the tension in a string to calculate the tension. In this problem, we found that the tension in the string was 49 N when a 5-kilogram mass was hanging from the end of the string.
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Giving that A={1,1/2,1/3,1/4...}, find the (a) lower
bound of A. (b) greatest lower bound of A (c) upper bound of A (d)
least upper bound of
A
(a) The lower bound of a set represents a value that is less than or equal to all the elements in the set. For the set A={1, 1/2, 1/3, 1/4...}, there is no specific lower bound since the set contains infinitely many decreasing elements.
(b) The greatest lower bound, also known as the infimum, is the largest value that is less than or equal to all the elements in the set. In this case, the infimum of set A is 0 because 0 is less than or equal to all the elements in the set.
(c) Since there are no upper limits given, the set A={1, 1/2, 1/3, 1/4...} does not have an upper bound.
(d) Similarly, without any upper limits, the set A={1, 1/2, 1/3, 1/4...} does not have a least upper bound or supremum.
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An account had $500 deposited 50 years ago at 4.65% interest compounded daily. Under the Banker's Rule, banks could use n=360 instead of 365 because it led to less-difficult, quicker calculations. A) The original terms involved the Banker's Rule, using n=360. Find balance after 50 years under those terms.
Using the Banker's Rule with n=360, the balance after 50 years is $5112.57 and can be calculated by compounding the initial deposit of $500 at an interest rate of 4.65% compounded daily.
To find the balance after 50 years using the Banker's Rule with n=360, we can use the formula for compound interest: A = P(1 + r/n)^(n*t), where A is the final balance, P is the principal (initial deposit), r is the interest rate, n is the number of compounding periods per year, and t is the number of years.
In this case, the principal P is $500, the interest rate r is 4.65% (or 0.0465 as a decimal), the compounding periods per year n is 360, and the number of years t is 50. Plugging these values into the formula, we have:
A = 500(1 + 0.0465/360)^(360*50)
Simplifying the expression inside the parentheses:
1 + 0.0465/360 ≈ 1.000129167
Substituting the values into the equation:
A ≈ 500(1.000129167)^(18000)
Evaluating the exponent:
(1.000129167)^(18000) ≈ 10.2251
Calculating the final balance:
A ≈ 500 * 10.2251 ≈ $ 5112.57
Therefore, under the Banker's Rule with n=360, the balance after 50 years would be approximately $5112.57.
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kindly assist please
Sharkey's Fun Centre contains a number of electronic games, as well as a miniature golf course and various rides located outside the building. Paul Sharkey, the owner, would like to construct a water
Paul Sharkey, the owner of Sharkey's Fun Centre, wishes to expand the facility by constructing a water slide in the compound. The addition of this new feature is aimed at drawing more customers to the premises and increasing revenues.
The management understands that the implementation of such a project can be expensive. Still, the investment is necessary for the continued success of the business. Sharkey's Fun Centre already has a miniature golf course, various rides, and a range of electronic games.
However, the water slide will provide an additional attraction to customers. The facility is in an ideal location with excellent visibility and easy access, making it convenient for families with children to visit.
The addition of a water slide will make Sharkey's Fun Centre a one-stop-shop for families.
The construction of a water slide in Sharkey's Fun Centre is a necessary investment to attract more customers to the facility. The management understands that this project will require significant capital investment.
However, the business will benefit in the long run from increased revenues. Sharkey's Fun Centre is in a prime location with easy access and high visibility. The addition of a water slide will make it an even more popular destination for families with children.
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students attending a certain university can select from 110 major areas of study. a student's major is identified in the registrar's records with a two-or three-letter code (for example, statistics majors are identified by sta, math majors by ms). some students opt for a double major and complete the requirements for both of the major areas before graduation. the registrar was asked to consider assigning these double majors a distinct two- or three-letter code so that they could be identified through the student records system. (a) what is the maximum number of possible double majors available to the university's students? double majors (b) if any two- or three-letter code is available to identify majors or double majors, how many major codes are available? codes (c) how many major codes are required to identify students who have either a single major or a double major? codes (d) are there enough major codes available to identify all single and double majors at the university? yes no
(a) 5,995 is the maximum number of double majors, (b) The exact number would depend on the specific constraints, (c) depend single majors and max double majors,
(a) The maximum number of possible double majors can be calculated using the combination formula. Since each major can be paired with any other major, the formula for calculating combinations is C(n, 2), where n is the number of majors. In this case, C(110, 2) = 5,995 is the maximum number of possible double majors.
(b) If any two- or three-letter code can be used to identify majors or double majors, the number of major codes available would depend on the number of unique combinations that can be formed from the available letters. The exact number of codes would depend on the specific constraints or rules for assigning codes.
(c) To identify students with either a single major or a double major, the total number of major codes required would be the sum of the codes needed for single majors and double majors. This would depend on the number of students pursuing single majors and the maximum number of possible double majors.
(d) Whether there are enough major codes available to identify all single and double majors at the university depends on the specific number of codes required and the number of codes available. Without specific information on the number of single and double majors, it is not possible to determine if there are enough codes available.
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during a routine check of the fluoride content of gotham city's water supply, the given results were obtained from replicate analyses of a single sample: 0.611 mg/l, 0.591 mg/l, 0.611 mg/l, 0.589 mg/l, and 0.611 mg/l. determine the mean and 90% confidence interval for the average fluoride concentration in this sample.
The mean fluoride concentration in the sample is approximately 0.6024 mg/l, and the 90% confidence interval for the average fluoride concentration is (0.5498, 0.6549) mg/l.
To determine the mean and 90% confidence interval for the average fluoride concentration in the sample, we can calculate the sample mean and the margin of error.
First, calculate the sample mean:
Mean = (0.611 + 0.591 + 0.611 + 0.589 + 0.611) / 5 = 0.6024 mg/l
Next, calculate the standard deviation of the sample:
Standard Deviation = sqrt(((0.611-0.6024)^2 + (0.591-0.6024)^2 + (0.611-0.6024)^2 + (0.589-0.6024)^2 + (0.611-0.6024)^2) / (5-1))
= sqrt(0.0002744 + 0.0006272 + 0.0002744 + 0.0007928 + 0.0002744)
= sqrt(0.0022432)
= 0.0473 mg/l (approximately)
Next, calculate the margin of error using the formula:
Margin of Error = (Critical Value) * (Standard Deviation / sqrt(n))
Since we want a 90% confidence interval, the critical value can be obtained from the t-distribution table for n-1 degrees of freedom. For a sample size of 5 and a 90% confidence level, the critical value is approximately 2.776.
Margin of Error = 2.776 * (0.0473 / sqrt(5))
= 0.0526 mg/l (approximately)
Finally, calculate the confidence interval:
Confidence Interval = (Mean - Margin of Error, Mean + Margin of Error)
= (0.6024 - 0.0526, 0.6024 + 0.0526)
= (0.5498, 0.6549)
Therefore, the mean fluoride concentration in the sample is approximately 0.6024 mg/l, and the 90% confidence interval for the average fluoride concentration is (0.5498, 0.6549) mg/l.
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A weight is attached to a spring and reaches its equilibrium position(x=0). It is then set in motion resulting in a displacement of x=8 cos t, where x is measured in centimeters and t is measured inseconds.a) What is the spring
When the weight moves from x = -8 cm to x = 8 cm, the spring moves from its maximum stretched position to its maximum compressed position.Hence, the spring oscillates between its maximum stretched and compressed positions when the weight is set in motion. Therefore, the spring is a simple harmonic oscillator.
Given: Displacement x
= 8 cos t
= Acos(ωt+ φ) where A
= 8 cm, ω
= 1 and φ
=0. To find: What is the spring?Explanation:We know that displacement is given by x
= 8 cos t
= Acos(ωt+ φ) where A
= 8 cm, ω
= 1 and φ
=0.Comparing this with the standard equation, x
= Acos(ωt+ φ)A
= amplitude
= 8 cmω
= angular frequencyφ
= phase angleWhen the spring is at equilibrium position, the weight attached to the spring does not move. Hence, no force is acting on the weight at the equilibrium position. Therefore, the spring is neither stretched nor compressed at the equilibrium position.Now, the spring is set in motion resulting in a displacement of x
= 8 cos t
= Acos(ωt+ φ) where A
= 8 cm, ω
= 1 and φ
=0. The maximum displacement of the spring is 8 cm in the positive x direction. When the weight is at x
= 8 cm, the restoring force of the spring is maximum in the negative x direction and it pulls the weight towards the equilibrium position. At the equilibrium position, the weight momentarily stops. When the weight moves from x
= 8 cm to x
= -8 cm, the spring moves from its natural length to its maximum stretched position. At x
= -8 cm, the weight momentarily stops. When the weight moves from x
= -8 cm to x
= 8 cm, the spring moves from its maximum stretched position to its maximum compressed position.Hence, the spring oscillates between its maximum stretched and compressed positions when the weight is set in motion. Therefore, the spring is a simple harmonic oscillator.
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The displacement of the weight attached to the spring is given by the equation x = 8 cos t. The amplitude of the motion is 8 centimeters and the period is 2π seconds.
Explanation:The equation x = 8 cos t represents the displacement of a weight attached to a spring in simple harmonic motion. In this equation, x is measured in centimeters and t is measured in seconds.
The amplitude of the motion is 8 centimeters, which means that the weight oscillates between x = 8 and x = -8.
The period of the motion can be determined from the equation T = 2π/ω, where ω is the angular frequency. In this case, ω = 1, so the period T is 2π seconds.
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Sketch the graph of \( f \) by hand and use your sketch to find the absolute and local maximum and minimum values of \( f \). (If an answer does not exist, enter DNEy) \[ f(x)=\left\{\begin{array}{ll}
The absolute max is 0, the absolute min is 2 and the function has no local max or min.
The given function is:
[tex]$$f(x)=\left\{\begin{array}{ll} 2x-x^2& \text{ for } x< 2 \\ 4-2x & \text{ for } x \ge 2\end{array}\right.$$[/tex]
To sketch the graph of \( f(x) \), we need to find its domain and range. The domain of the function is all values of x that make the function defined. From the given function, the first piece of the function is defined for x < 2 and the second piece of the function is defined for [tex]\(x\ge 2\)[/tex]. Hence the domain is [tex]\((- \infty, 2) \cup [2, \infty)\)[/tex].
Next, we will find the range of the function, which is the set of all possible output values. We can see that both pieces of the function are decreasing functions, hence their ranges are [tex]\(( - \infty, -1] \)[/tex] and [tex]\([2, \infty) \)[/tex] respectively.
Now, we will sketch the graph of [tex]\(f(x)\)[/tex] using the domain and range obtained above.
Absolute Max: The absolute max is the maximum value of the function over its entire domain. Since the function is decreasing for [tex]\(x< 2\)[/tex] its absolute maximum value is at the left endpoint of the domain i.e. at
[tex]\(x = -\infty\)[/tex]
Absolute max is 0.
Absolute Min: The absolute min is the minimum value of the function over its entire domain. Since the function is decreasing for [tex]\(x\ge 2\)[/tex] its absolute minimum value is at the right endpoint of the domain i.e. at
[tex]\(x = \infty\)[/tex]
Absolute min is 2.
Local Max: The function has no local maximum.
Local Min: The function has no local minimum.
Therefore, the absolute max is 0, the absolute min is 2 and the function has no local max or min.
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Triangle J K L is shown. The length of J K is 13, the length of K L is 11, and the length of L J is 19.
Law of cosines: a2 = b2 + c2 – 2bccos(A)
Find the measure of AngleJ, the smallest angle in a triangle with sides measuring 11, 13, and 19. Round to the nearest whole degree.
30°
34°
42°
47°
Rounding to the nearest whole degree, the measure of Angle J is approximately 34 degrees.
The correct answer is B°.
To find the measure of Angle J, we can use the Law of Cosines:
[tex]a^2 = b^2 + c^2 - 2bc \times cos(A)[/tex]
In this case, the side opposite Angle J is KL (length 11), and the other two sides are JK (length 13) and LJ (length 19).
Plugging in the values:
[tex]11^2 = 13^2 + 19^2 - 2 \times 13 \times 19 \times cos(A)[/tex]
Simplifying:
[tex]121 = 169 + 361 - 494 \times cos(A)[/tex]
Combine like terms:
[tex]-409 = -494 \times cos(A)[/tex]
Dividing both sides by -494:
[tex]cos(A) =\frac{-409 }{-494}[/tex]
[tex]cos(A) \approx 0.82802547771[/tex]
To find the measure of Angle J, we can use the inverse cosine function:
[tex]A \approx cos^{(-1)}(0.82802547771)[/tex]
[tex]A \approx 34.043[/tex]
Rounding to the nearest whole degree, the measure of Angle J is approximately 34 degrees.
Therefore, the correct answer is B.
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determine whether the integral is convergent or divergent. if it is convergent, evaluate it. (if the quantity diverges, enter diverges.) 1 26 e1/x x3 dx
The given integral, ∫(1 to 26) e^(1/x) / x^3 dx, diverges.
To determine whether the integral is convergent or divergent, we need to analyze the behavior of the integrand as x approaches the limits of integration. In this case, the limits of integration are from 1 to 26.
Let's consider the function e^(1/x) / x^3. As x approaches 0 from the right (x → 0+), the numerator e^(1/x) approaches 1 since the exponent tends to 0. However, the denominator x^3 approaches 0, resulting in an undefined value for the integrand at x = 0.
As a result, the integrand has an essential singularity at x = 0, which makes the integral divergent. When an integrand has an essential singularity within the interval of integration, the integral does not converge.
Therefore, the given integral, ∫(1 to 26) e^(1/x) / x^3 dx, diverges.
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4.(6 points) Evaluate the double integral SS {1+ sin(x²) + cos (y²) } dA, where D is bounded by D x = 1, y = 1, x+y=1.
The value of the given double integral over the region bounded by the lines x = 1, y = 1, and x + y = 1 is [0.417].
To evaluate the double integral, we first need to determine the limits of integration for x and y. The region D is bounded by the lines x = 1, y = 1, and x + y = 1. By analyzing these equations, we find that the region is a triangle with vertices at (0, 1), (1, 0), and (1, 0).
Next, we can express the given function, 1 + sin(x²) + cos(y²), as f(x, y). To find the double integral, we integrate this function over the region D by iteratively integrating with respect to x and y.
Integrating with respect to x, we obtain the integral of f(x, y) with respect to x from x = 0 to x = 1-y. Then, we integrate the resulting expression with respect to y from y = 0 to y = 1.
After evaluating the integral, the value of the double integral over the given region D is approximately 0.417.
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a 10-kg suitcase is placed on a scale that is in an elevator. in which direction is the elevator accelerating when the scale reads 75 n and when it reads 120 n?
Answer:
Downward when it reads 75 N and upward when it reads 120 N
Step-by-step explanation:
If $9000 is invested at 5.1% annual interest, find the value of the investment at the end of six years if the interest is compounded (i) annually, (ii) quarterly, (iii) monthly, (iv) weekly, (v) daily, and (vi) continuously. (vii) If the interest is compounded continuously, how long will it take until the $9000 investment is worth a quarter-million dollars, $250,000? (viii) If the interest is compounded continuously, what is the instantaneous rate of change of the value at the eleven-year mark.
(i) $11,851.82. (ii) $11,906.18. (iii) $11,923.68. (iv) $11,928.71.
(v) $11,930.16. (vi) $11,930.40. (vii) 22.62 years. (viii) Instantaneous rate of change of the value at the eleven-year mark is $484.80 per year.
To calculate the value of the investment at the end of six years with different compounding frequencies, we can use the formula for compound interest: [tex]A = P(1 + r/n)^(nt)[/tex], where A is the final amount, P is the principal (initial investment), r is the interest rate, n is the compounding frequency per year, and t is the time in years.
(i) When compounded annually: A = $9000[tex](1 + 0.051/1)^(1*6)[/tex] = $11,851.82.
(ii) When compounded quarterly: A = $9000[tex](1 + 0.051/4)^(4*6)[/tex] = $11,906.18.
(iii) When compounded monthly: A = $9000[tex](1 + 0.051/12)^(12*6) =[/tex]$11,923.68.
(iv) When compounded weekly: A = $9000[tex](1 + 0.051/52)^(52*6) =[/tex]$11,928.71.
(v) When compounded daily: A = $9000([tex]1 + 0.051/365)^(365*6) =[/tex]$11,930.16.
(vi) When compounded continuously: A = $9000[tex]* e^(0.051*6)[/tex]= $11,930.40.
(vii) To find the time it takes for the investment to reach $250,000 when compounded continuously, we can rearrange the formula: t = ln(A/P) / (r). Plugging in the values, we get t = ln(250000/9000) / (0.051) ≈ 22.62 years.
(viii) The instantaneous rate of change at the eleven-year mark when compounded continuously can be found using the derivative of the formula: dA/dt =[tex]P * r * e^(r*t)[/tex]. Plugging in the values, we get dA/dt = $9000 * 0.051 * [tex]e^(0.051*11)[/tex]≈ $484.80 per year.
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At which points on the parametric curve,(x,y) = (t^3-3t, 4+t-3t^2)is the tangent line to the curve vertical?
A. (-2, 2) only.
B. (-1, 0), (1, 2), and (2, 0) only.
C. (-2, 2) and (2, 0) only.
D. (2, 2) and (1, 2) only.
E. (2, 2), (-1, 2), and (2, 0) only.
The required points are (-1, 0), (1, 2), and (2, 0) only. Hence, the correct option is B.
The given parametric curve is[tex](x,y) = (t^3-3t, 4+t-3t^2).[/tex]
Now, let's first find the expression of dy/dx by differentiating with respect to t.
Using the chain rule of differentiation, we get:
[tex]\frac{dy}{dx}=\frac{dy}{dt}\cdot \frac{dt}{dx}[/tex]
Here, [tex]$\frac{dy}{dt}=1-6t$ and $\frac{dx}{dt}=3t^2-3.$[/tex]
Putting these values in the above equation, we get:
[tex]\frac{dy}{dx}=\frac{1-6t}{3t^2-3}\\=-\frac{2t-1}{t^2-1}[/tex]
Now, let's find the points at which the tangent line is vertical.
For the tangent line to be vertical, the derivative of the curve must be undefined. Hence, we need to find the values of 't' for which the denominator becomes zero, i.e. [tex]t² - 1 = 0.[/tex]
Therefore,[tex]t = -1 and t = 1.[/tex]
Therefore, the required points are (-1, 0), (1, 2), and (2, 0) only. Hence, the correct option is B.
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At noon, ship A is \( 130 \mathrm{~km} \) east of ship B. Ship A is sailing east at \( 45 \mathrm{~km} / \mathrm{h} \) and ship B is sailing north at \( Z 0 \mathrm{~km} / \mathrm{h} \). (a) What is t
The time is 0.96 hours or 57.6 minutes. Hence, the required time is 0.96 hours
Distance between the two ships is a constant value and it can be found using Pythagoras' theorem.
Distance formula is given by, [tex]$D = \sqrt{X^2+Y^2}$[/tex]
Where, D = Distance between two shipsX = Distance travelled by Ship AY = Distance travelled by Ship B Here, Y = 0 because Ship B is moving North and Ship A is moving East. Therefore, Y will be equal to 0. X will be equal to the distance travelled by Ship A.
Distance travelled by Ship A after time t is given by, [tex]$X = 45t$[/tex]
Using the formula, Distance formula is given by,[tex]$D = \sqrt{X^2+Y^2}$[/tex]
Substitute the values of X and Y in the above formula.
D = [tex]√$(45t)^2 + (0)^2$D = √$2025t^2$D = $45t \sqrt{9}$D = $45t3$[/tex]
Given that Distance between two ships is 130 km
So, [tex]$D = 45t3 = 130$ km[/tex]
Solving for [tex]t, $t = \frac{130}{45 \times 3}$t = 0.96 h[/tex]
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Use Lagrange multipliers to find the indicated extrema, assuming that \( x \) and \( y \) are positive. Minimize \( f(x, y)=x^{2}+y^{2} \) Constraint: \( x+2 y-10=0 \)
By using Lagrange multipliers, we can find the extrema of the function [tex]\(f(x, y)=x^{2}+y^{2}\)[/tex] subject to the constraint [tex]\(x+2y-10=0\)[/tex]. The minimum point occurs at [tex]\(x=2\)[/tex] and [tex]\(y=4\)[/tex].
To find the extrema of the function subject to the given constraint, we can set up the Lagrange multiplier equation:
[tex]\(\nabla f(x, y) = \lambda \nabla g(x, y)\)[/tex],
where [tex]\(g(x, y) = x + 2y - 10\)\\[/tex] is the constraint function. The gradients of [tex]\(f\)[/tex] and [tex]\(g\)[/tex] are:
[tex]\(\nabla f(x, y) = (2x, 2y)\)[/tex],
[tex]\(\nabla g(x, y) = (1, 2)\)[/tex].
Equating the gradients, we have:
[tex]\(2x = \lambda\)[/tex],
[tex]\(2y = 2\lambda\)[/tex],
[tex]\(x + 2y - 10 = 0\)[/tex].
From the second equation, we can deduce that \(y = \lambda\). Substituting this into the third equation gives:
[tex]\(x + 4\lambda - 10 = 0\)[/tex].
Solving this equation along with the other two, we find [tex]\(x = 2\), \(y = 4\)[/tex], and [tex]\(\lambda = 1\)[/tex].
Thus, the minimum point of [tex]\(f(x, y)\)[/tex] subject to the constraint [tex]\(x+2y-10=0\)[/tex] occurs at [tex]\(x=2\) and \(y=4\)[/tex].
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the planet shm'lort uses a different timing system from ours. after making contact, human astronauts tried to figure out how to convert between the two systems. they determined that there are 3 blarsfs and 18 crobs in a minute and 7 blarsfs and 2 crobs in two minutes. how much earth time, in seconds, elapses in 9 blarsfs and 6 crobs?
In conclusion, 9 blarsfs and 6 crobs on Shm'lort correspond to approximately 200 seconds in Earth time.
Let's start by finding the conversion rates between Shm'lort time and Earth time. From the given information, we know that 3 blarsfs and 18 crobs correspond to 1 minute on Shm'lort. This means that 1 blarsf is equivalent to 20 seconds (60 seconds / 3 blarsfs) and 1 crob is equivalent to 3.33 seconds (60 seconds / 18 crobs).
Next, we can use the conversion rates to calculate the Earth time for 9 blarsfs and 6 crobs:
9 blarsfs = 9 blarsfs * 20 seconds/blarsf = 180 seconds
6 crobs = 6 crobs * 3.33 seconds/crob = 19.98 seconds (approximately 20 seconds)
Therefore, the total Earth time elapsed for 9 blarsfs and 6 crobs on Shm'lort is 180 seconds (blarsfs) + 20 seconds (crobs) = 200 seconds.
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determine whether the integral is convergent or divergent. [infinity] dv v2 2v − 3 2 convergent divergent if it is convergent, evaluate it. (if the quantity diverges, enter diverges.)
The integral is convergent. The integral, we get: [tex]\[\int\limits_{\infty }^{v}\frac{dv}{v^{2}(2v-3)^{2}}=-\frac{B}{3}+\frac{1}{18D}\][/tex]
The integral is given as: [tex]\[\int\limits_{\infty }^{v}\frac{dv}{v^{2}(2v-3)^{2}}\][/tex]
We will solve it using the partial fraction method.
Let A and B be two constants.
[tex]\[\frac{1}{v^{2}(2v-3)^{2}}=\frac{A}{v}+\frac{B}{v^{2}}+\frac{C}{2v-3}+\frac{D}{(2v-3)^{2}}\][/tex]
On simplification:
[tex]\[\frac{1}{v^{2}(2v-3)^{2}}=\frac{2A(2v-3)^{2}+Bv(2v-3)^{2}+Cv^{2}(2v-3)+Dv^{2}}{v^{2}(2v-3)^{2}}\]\[1=2A(2v-3)^{2}+Bv(2v-3)^{2}+Cv^{2}(2v-3)+Dv^{2}\][/tex]
Substituting the values of v as 0, 3/2, ∞, and - ∞, we get the values of A, B, C, and D.
The values of A, B, C, and D can be solved as follows:
When v = 0, 1 = D × 0.
Thus, D = ∞.
When v = 3/2, 1 = (2A × 0 + B × 0 + C × 9/4 + D × 9/4).
Thus, C + 9D/4 = 4/9.
If D is finite, C = 4/9 and D = 0.
When v = ∞, 0 = 4A.
Thus, A = 0.
When v = - ∞, 0 = - 4C.
Thus, C = 0.B and D remain unknown.
Let's solve the integral after assuming that B and D are non-zero.
Thus, the integral becomes:
[tex]\[\int\limits_{\infty }^{v}\frac{dv}{v^{2}(2v-3)^{2}}=\int\limits_{\infty }^{v}\left[ \frac{A}{v}+\frac{B}{v^{2}}+\frac{D}{(2v-3)^{2}} \right]dv\]\[=\int\limits_{\infty }^{v}\left[ \frac{B}{v^{2}} \right]dv+\int\limits_{\infty }^{v}\left[ \frac{D}{(2v-3)^{2}} \right]dv\]\[=\frac{B}{v}-\frac{D}{2(2v-3)}+\left[ \frac{1}{6D(2v-3)}+\frac{1}{2(2v-3)^{2}} \right]\][/tex]
On substituting the limit values v = ∞ and v = 1, we obtain:
[tex]\[\int\limits_{\infty }^{v}\frac{dv}{v^{2}(2v-3)^{2}}=-\frac{B}{3}+\frac{D}{3}+\frac{1}{18D}\][/tex]
If the integral is convergent or divergent, we will know by calculating the values of B and D.
Convergence or divergence of the integral is not possible if B = 0 and D = 0.
However, if D = 0, C is not infinite, implying that the integral is convergent.
On evaluating the integral, we get:
[tex]\[\int\limits_{\infty }^{v}\frac{dv}{v^{2}(2v-3)^{2}}=-\frac{B}{3}+\frac{1}{18D}\][/tex]
Hence, the integral is convergent.
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In 1994, the cost of a painting was about $5. In 2000, the cost was $18. If the cost is growing exponentially, predict the cost of the painting in 2018. Round to the nearest cent.
The predicted cost of the painting in 2018 is $217.08. If the cost of the painting is growing exponentially, then it is following an exponential growth model. We can use the formula for exponential growth to predict the cost of the painting in 2018.
If the cost of the painting is growing exponentially, then it is following an exponential growth model. We can use the formula for exponential growth to predict the cost of the painting in 2018. Exponential growth formula: A = P(1 + r)n
Where: A is the final amount
P is the initial amount
r is the annual growth rate
n is the number of years
In this case: P = 5 (the cost of the painting in 1994)
r = the annual growth rate
We can use the given information to find the annual growth rate: r = (A/P)^(1/n) - 1
r = (18/5)^(1/6) - 1
r ≈ 0.3109 (rounded to four decimal places)
We can now use this value of r and the formula for exponential growth to predict the cost of the painting in 2018.
P = 5(1 + 0.3109)^24
P ≈ 217.08 (rounded to two decimal places)
Therefore, the predicted cost of the painting in 2018 is $217.08.
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Consider F and C below. F(x,y)=(3+8xy2)i+8x2yj,C is the arc of the hyperbola y=x1 from (1,1) to (2,21) (a) Find a function f such that F=∇f. f(x,y)= (b) Use part (a) to evaluate ∫CF⋅dr along the given curve C.
The function [tex]\( f(x, y) = 3x + 4xy^2 \)[/tex] satisfies [tex]\( F = \nabla f \)[/tex],where [tex]\( F(x, y) = (3 + 8xy^2)i + 8x^2yj \)[/tex]. To evaluate [tex]\( \int_C F \cdot dr \)[/tex]along the curve C, we need to express F in terms of the parameterization of C and then integrate [tex]\( F \cdot dr \)[/tex] over the parameter domain of C.
To find the function f(x, y) such that [tex]\( F = \nabla f \)[/tex], we can integrate the components of F with respect to their corresponding variables. Integrating the first component with respect to x gives [tex]\( f(x, y) = 3x^2 + 4x^2y^2 + g(y) \)[/tex], where g(y) is a function of y only. Taking the partial derivative of f(x, y) with respect to y and comparing it to the second component of F gives [tex]\( g'(y) = 8x^2y \)[/tex]. Integrating g'(y) with respect to y gives [tex]\( g(y) = 4x^2y^2 + h(x) \)[/tex], where h(x) is a function of x only. Combining the results, we obtain [tex]\( f(x, y) = 3x^2 + 4x^2y^2 + 4x^2y^2 + h(x) = 3x^2 + 8x^2y^2 + h(x) \)[/tex].
To evaluate [tex]\( \int_C F \cdot dr \)[/tex] along the curve C , we need to parameterize C . Since C is the arc of the hyperbola [tex]\( y = x^{-1} \)[/tex] from (1, 1) to (2, 1/2), we can parameterize it as [tex]\( r(t) = (t, t^{-1}) \)[/tex], where t varies from 1 to 2. Using the parameterization, we can express F in terms of t as [tex]\( F(t) = (3 + 8t^{-1})i + 8t^2t^{-1}j = (3 + 8t^{-1})i + 8tj \)[/tex]. Now we can calculate [tex]\( F \cdot dr \)[/tex] along C by substituting the parameterization into F and taking the dot product with the derivative of [tex]\( r(t) \)[/tex] with respect to t . We have [tex]\( F \cdot dr = (3 + 8t^{-1})dt + 8t^{-1}(-t^{-2})dt = (3 + 8t^{-1})dt - 8t^{-3}dt \)[/tex]. Integrating [tex]\( F \cdot dr \)[/tex] over the interval [tex]\([1, 2]\)[/tex] gives [tex]\( \int_C F \cdot dr = \int_1^2 (3 + 8t^{-1} - 8t^{-3})dt \)[/tex].
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A curve has slope 3x 2y at every point (x,y). If it is known that the curve passes through the point (0,−2), what is the equation of the curva?
The curve has a slope of 3x^2y at every point and passes through (0, -2). The equation of the curve is y = -x^3/2, obtained by integrating the slope expression and applying the given point.
To find the equation of the curve, we start with the given information that the slope of the curve at any point (x, y) is 3x^2y. This implies that the rate of change of y with respect to x is equal to 3x^2y.
To obtain the equation of the curve, we integrate this rate of change expression with respect to x. Integrating 3x^2y dx gives us x^3y + C(x), where C(x) is the constant of integration that accounts for any additional terms. Since we are given that the curve passes through the point (0, -2), we can substitute these values into the equation.
Substituting x = 0 and y = -2, we get 0^3(-2) + C(0) = -2. This implies that C(0) = -2. Therefore, the equation of the curve becomes x^3y - 2 = 0.
Simplifying further, we have y = -x^3/2 as the equation of the curve passing through the point (0, -2).
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Find the derivative of the following function F(x)=∫x²x7⁷(2t−1)3dt using the Fundamental Theorem of Calculus. F′(x)=
The derivative of the given function F(x) = ∫x²x^7(2t−1)³dt using the Fundamental Theorem of Calculus is F′(x) = (2x-1)^3 * 7x^6.
Hence, the correct answer is option A.
To find the derivative of the given function using the Fundamental Theorem of Calculus, we can follow these steps:
Step 1: Rewrite the given function as F(x) = ∫u(x) v(t) dt, where u(x) = x^7 and v(t) = (2t-1)^3.
Step 2: According to the Fundamental Theorem of Calculus, F'(x) = d/dx [∫u(x) v(t) dt] = v(x) u'(x).
Therefore, F′(x) = v(x) u'(x).
Step 3: Find v(x) and u'(x) and substitute them into the formula to obtain the derivative of the given function.
Step 4: Differentiate u(x) to find u'(x) = 7x^6.
Step 5: Substitute x into v(t) to find v(x) = (2x-1)^3.
Step 6: Substitute v(x) and u'(x) into the formula F′(x) = v(x) u'(x) to get F′(x) = (2x-1)^3 * 7x^6.
Therefore, the derivative of the given function F(x) = ∫x²x^7(2t−1)³dt using the Fundamental Theorem of Calculus is F′(x) = (2x-1)^3 * 7x^6. Hence, the correct answer is option A.
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#59
Cartesian to Polar Equations Replace the Cartesian equations in Exercises 53-66 with equivalent polar equations. 53. \( x=7 \) 54. \( y=1 \) 55. \( x=y \) 56. \( x-y=3 \) 57. \( x^{2}+y^{2}=4 \) 58. \
The Cartesian to Polar equations can be defined as a set of equations that convert the coordinates of a point from Cartesian coordinates to Polar coordinates. We can define the Cartesian coordinates (x,y) in terms of the polar coordinates (r,θ) as follows:
Here, x is the horizontal coordinate, y is the vertical coordinate, r is the radial coordinate, and θ is the angular coordinate. We can use these relationships to convert the Cartesian equations to Polar equations.53. \( x=7 \)In polar coordinates, x = rcosθ.
Therefore, rcosθ = 7. We can write this as r = 7/cosθ.54. \( y=1 \)In polar coordinates, y = rsinθ. Therefore, rsinθ = 1. We can write this as r = 1/sinθ.55. \( x=y \)In polar coordinates, x = rcosθ and y = rsinθ.
Therefore, rcosθ = rsinθ. Dividing by r, we get tanθ = 1. Therefore, θ = π/4 or 5π/4.56. \( x-y=3 \)We can write this as y = x - 3. In polar coordinates, x = rcosθ and y = rsinθ. Therefore, rsinθ = rcosθ - 3.
Dividing by cosθ, we get tanθ = sinθ/cosθ = 1 - 3/cosθ. Therefore, cosθ = 3/(1 - tanθ). We can substitute this expression for cosθ in the equation rcosθ = x to get the polar equation in terms of r and θ.57. \( x^{2}+y^{2}=4 \)In polar coordinates, x = rcosθ and y = rsinθ.
Therefore, r^{2}cos^{2}θ + r^{2}sin^{2}θ = 4. Simplifying, we get r^{2} = 4 or r = ±2. Therefore, the polar equation is r = 2 or r = -2.58. \( y = x^{2} \)In polar coordinates, x = rcosθ and y = rsinθ. Therefore, rsinθ = r^{2}cos^{2}θ. Dividing by rcos^{2}θ, we get tanθ = r*sinθ/cos^{3}θ. Therefore, r = tanθ/cos^{3}θ.
The Cartesian to Polar equations can be defined as a set of equations that convert the coordinates of a point from Cartesian coordinates to Polar coordinates. We can define the Cartesian coordinates (x,y) in terms of the polar coordinates (r,θ) as follows:Here, x is the horizontal coordinate, y is the vertical coordinate, r is the radial coordinate, and θ is the angular coordinate. We can use these relationships to convert the Cartesian equations to Polar equations.53. \( x=7 \).
In polar coordinates, x = rcosθ. Therefore, rcosθ = 7. We can write this as r = 7/cosθ.54. \( y=1 \)In polar coordinates, y = rsinθ. Therefore, rsinθ = 1. We can write this as r = 1/sinθ.55. \( x=y \)In polar coordinates, x = rcosθ and y = rsinθ. Therefore, rcosθ = rsinθ.
Dividing by r, we get tanθ = 1. Therefore, θ = π/4 or 5π/4.56. \( x-y=3 \)We can write this as y = x - 3. In polar coordinates, x = rcosθ and y = rsinθ. Therefore, rsinθ = rcosθ - 3. Dividing by cosθ, we get tanθ = sinθ/cosθ = 1 - 3/cosθ. Therefore, cosθ = 3/(1 - tanθ).
We can substitute this expression for cosθ in the equation rcosθ = x to get the polar equation in terms of r and
[tex]θ.57. \( x^{2}+y^{2}=4 \)[/tex]In polar coordinates, x = rcosθ and y = rsinθ. Therefore,[tex]r^{2}cos^{2}θ + r^{2}sin^{2}θ = 4[/tex]. Simplifying, we get r^{2} = 4 or r = ±2.
Therefore, the polar equation is r = 2 or r = -2.58. \( y = x^{2} \)In polar coordinates, x = rcosθ and y = rsinθ. Therefore, [tex]rsinθ = r^{2}cos^{2}θ[/tex]. Dividing by rcos^{2}θ, we get tanθ = r*sinθ/cos^{3}θ. Therefore, r = tanθ/cos^{3}θ.
Thus, these are the Polar equations that are equivalent to the given Cartesian equations.
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4. Length of the arc of the function defined by \( y=\sqrt{x} \) where \( 1 \leq x \leq 9 \) using \( x \) as variable o integration \[ L=\text {. } \] 5. Length of the curve of the function defined b
Firstly, let's calculate the length of the arc of the function defined by y = √x where 1 ≤ x ≤ 9 using x as variable of integration. Here, we have to use the formula to determine the length of the arc of the function which is given as:
L=\int_{a}^{b}\sqrt{1+(f'(x))^2}dx
As we have \(y = \sqrt{x}\) then, let's solve this as:
[tex]\[\begin{aligned} L &= \int_{1}^{9} \sqrt{1 + \left( \frac{d}{dx} \sqrt{x} \right)^2 }dx \\ & = \int_{1}^{9} \sqrt{1 + \frac{1}{4x}}dx \end{aligned}\]Now, substitute u = 2x: \[\begin{aligned} L & = \frac{1}{2}\int_{2}^{18} \sqrt{1 + \frac{1}{u}}du \\ & = \frac{1}{2}\int_{2}^{18} \sqrt{\frac{u+1}{u}}du \end{aligned}\][/tex]
Now, let's substitute \(u+1 = v^2\), which means
\(du = 2v\,dv\)Thus: $$ L = \int_{\sqrt{3}}^{5} 2\sqrt{v^2 -1 }dv
Therefore:
[tex]\[\begin{aligned} L &= \left[ \frac{1}{2}(v\sqrt{v^2 -1} + \ln(v+\sqrt{v^2 -1})\right]_{\sqrt{3}}^{5} \\ & = \frac{1}{2}(5\sqrt{24} + \ln(5+\sqrt{24})) - \frac{1}{2}(\sqrt{3} + \ln(\sqrt{3}+1)) \\ &= \frac{1}{2} \sqrt{24}\left(5+\ln \frac{5+\sqrt{24}}{2}\right) - \frac{1}{2} \ln(2+\sqrt{3}) \end{aligned}\].[/tex]
Therefore, the length of the arc of the function defined by y = √x where 1 ≤ x ≤ 9 using x as variable of integration is
[tex]\(L = \frac{1}{2} \sqrt{24}\left(5+\ln \frac{5+\sqrt{24}}{2}\right) - \frac{1}{2} \ln(2+\sqrt{3})\).[/tex]
In the above problem, we have found the length of the arc of the function defined by y = √x where 1 ≤ x ≤ 9 using x as variable of integration. The formula used to determine the length of the arc of the function is given by:$$ L=\int_{a}^{b}\sqrt{1+(f'(x))^2}dx.
For this formula, we first calculated the derivative of y with respect to x i.e., y' then we substituted it in the above formula to find the length of the arc of the function.
In order to solve the problem, we first wrote the given function y = √x. Then, we used the formula which is given above and we calculated the derivative of this function with respect to x i.e., y' which is equal to \(\frac{1}{2\sqrt{x}}\).
We then substituted this value in the formula to find the length of the arc of the function and we got the integral \[\int_{1}^{9} \sqrt{1 + \frac{1}{4x}}dx\].To simplify the integral, we substituted u = 2x. By doing so, the integral became simpler and we got \[\int_{\sqrt{3}}^{5} 2\sqrt{v^2 -1 }dv\].
We solved this integral and finally got the length of the arc of the function defined by y = √x where 1 ≤ x ≤ 9 using x as variable of integration which is
[tex]\(L = \frac{1}{2} \sqrt{24}\left(5+\ln \frac{5+\sqrt{24}}{2}\right) - \frac{1}{2} \ln(2+\sqrt{3})\).[/tex]
In the given problem, we used the formula to determine the length of the arc of the function defined by y = √x where 1 ≤ x ≤ 9 using x as variable of integration.
We first calculated the derivative of the given function y with respect to x i.e., y' which is equal to \(\frac{1}{2\sqrt{x}}\) and then substituted it in the formula to find the length of the arc of the function. We finally got the length of the arc of the function as
[tex]\(L = \frac{1}{2} \sqrt{24}\left(5+\ln \frac{5+\sqrt{24}}{2}\right) - \frac{1}{2} \ln(2+\sqrt{3})\).[/tex]
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The Marginal Revenue From Selling X Irons Is 102−0.06x Dollars Per Iron. Find The Revenue Function. (Hint: R(0)=0.) Answer Keyboard Shortcuts
the revenue function is R(x) = 102x - 0.03x²/2.
Given the marginal revenue from selling X irons as 102 - 0.06x dollars per iron, we can find the revenue function by integrating the marginal revenue function and adding a constant of integration, denoted as C.
Integrating the marginal revenue function, we have:
R(x) = ∫(102 - 0.06x) dx
Evaluating the integral, we get:
R(x) = [102x - 0.03x²/2] + C
Since the revenue at 0 irons is 0, we can substitute x = 0 into the revenue function to find the value of the constant C.
R(0) = [102(0) - 0.03(0)²/2] + C
0 = [0 - 0/2] + C
0 = 0 + C
C = 0
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Find equations of the tangents to the curve x = 3t^2 + 1, y = 2t^3 + 1 that pass through the point (4,3).
The slopes of the tangents at the points (1, 1) and (-5, 3) . Hence, the equations of the tangents are y = 2x - 1 and 13x + 9y - 78 = 0.
Given, x = 3t² + 1, y = 2t³ + 1The point through which the tangents pass is (4, 3).Let the point of contact be (h, k).
Then the slope of the tangent at that point is,dy/dx = (dy/dt)/(dx/dt)Also, the tangent passes through (4, 3).
So, we have:3t² + 1 = 4 .......(1)2t³ + 1 = 3 ........(2)Solving (1) and (2), we get,t = 1, -1
Substituting these values in (1) and (2), we get the points of contact:(4, 3) is the given point. So, we can use (1, 1) and (-5, 3) as the points of contact.
So the slopes of the tangents at the points (1, 1) and (-5, 3) are given by:dy/dx = (dy/dt)/(dx/dt) at (1, 1)
=> 18/9 = 2dy/dx = (dy/dt)/(dx/dt) at (-5, 3)
=> 78/(-54) = -13/9
The equations of the tangents are: y - 1 = 2(x - 1) => y = 2x - 1 and y - 3 = (-13/9)(x + 5) => 13x + 9y - 78 = 0
Hence, the equations of the tangents are y = 2x - 1 and 13x + 9y - 78 = 0.
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