the rotor blades of a helicopter are 19 ft long and are rotating at 190 rpm.a. find the angular speed w, of the rotorb. find the linear speed, v, of a point on the tip of a blade

Answers

Answer 1

If "rotor-blades" of a helicopter are 19 ft long , rotating at 190 rpm, then

(a) angular speed of rotor is 119.38 radians/second,

(b) linear speed at tip of blade is .

The "Angular-Speed" is defined as the rate at which an object rotates or revolves around a fixed point or axis.

The Length of the rotor blades is = 19 ft,

The number of Rotations per minute is (rpm) = 190 rpm,

Part (a) : The Angular speed of the rotor (w) is written as follows:

⇒ w = 2 × π × (rpm/60),

where π = 3.14159, rpm = 190,

Substituting the values,

We get,

⇒ w = 2 × 3.14159 × (190/60)

⇒ w ≈ 119.38 radians/second.

So, the angular speed is 119.38 radians/second.

Part (b) : Linear speed of a point on the "tip-of-blade" can be calculated using the formula:

⇒ v = r × w,

where r = length of "rotor-blade" and w = angular speed of rotor.

Substituting the values,

We get,

⇒ v = (19 ft) × (119.38 radians/second),

⇒ v ≈ 2265.22 ft/second,

Therefore, the linear-speed of a point is 2265.22 ft/second.

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Related Questions

A certain circle can be represented by the following equation. X^2 + y^2 - 18x + 20y + 177 = 0. What is the center of this circle? What’s the radius of this circle?

Answers

The center of this circle is (9, -10) and the radius is 2

What is the center of this circle?

From the question, we have the following parameters that can be used in our computation:

x^2 + y^2 - 18x + 20y + 177 = 0

When the above circle equation is factored, we have

(x - 9)^2 + (y + 10)^2 = 4

As a general rule, the equation of a circle is represented as

(x - a)^2 + (y - b)^2 = r^2

Where

center = (a, b)Radius = r

When the above equations are compared, we have

center = (a, b) = (9, -10)

Hence, the center is (9, -10)

What’s the radius of this circle?

In (a), we have

(x - 9)^2 + (y + 10)^2 = 4

As a general rule, the equation of a circle is represented as

(x - a)^2 + (y - b)^2 = r^2

Where

center = (a, b)Radius = r

When the above equations are compared, we have

r^2 = 4

So, we have

r = 2

Hence, the radius is 2

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Shirley uses pattern blocks to measure the straight angle. Select all the combinations of pattern block angles that Shirley could use to measure the angle. ​

Answers

The combination pattern block angle that apply for Shirley are;

A. 6 small angles on the tan pattern block

B. 1 large angle and one small angle on the red pattern block

D. 4 small angles on the tan pattern block and one small angle on the red pattern block.

How do we calculate these combination of pattern block angles?

For option A  the combination of 6 small angles on the tan pattern block, is

6 x 30° = 180°

For B, 1 large angle and one small angle on the red pattern block, which is 120 + 60 = 180°

For D, 4 small angles on the tan pattern block and one small angle on the red pattern block, which is 30 + 30 + 30 + 30 + 60 = 180°

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find the inverse of the function f(x) = 9x^3 + 2

the inverse of f is g(x)

Answers

rewrite as x = 9y^3 + 2. Then solve for y

Answer:

g(x) = 1/3 ∛(3(x - 2))

Step-by-step explanation:

f(x) = 9x³ + 2

interchange the variables:

x = 9y³ + 2

Solve for y:

9y³ = x - 2

y³ = (x - 2)/9

y = ∛((x - 2)/9)

y = ∛((x - 2)/9) · 3/3 = ∛(3(x - 2) / 27) = ∛(3(x - 2)) / 3    **multiply by 3/3 to simplify the radical

g(x) = 1/3 ∛(3(x - 2))

you have been given the following data: x 1 3 4 6 9 8 10 y 1 8 15 33 75 70 95 test to determine whether there is evidence of a linear relationship. please write the test hypothesis:

Answers

To test whether there is evidence of a linear relationship between the given data (x and y values), we can perform a hypothesis test.


Step 1: State the null hypothesis (H0) and the alternative hypothesis (H1).
H0: There is no linear relationship between x and y (i.e., the correlation coefficient, r, is equal to 0)
H1: There is a linear relationship between x and y (i.e., the correlation coefficient, r, is not equal to 0)
Step 2: Calculate the correlation coefficient, r, using the given data. You can do this using a statistical calculator or software.
Step 3: Determine the critical value for the correlation coefficient at a chosen significance level (e.g., 0.05).
Step 4: Compare the calculated correlation coefficient, r, to the critical value. If |r| is greater than the critical value, reject the null hypothesis (H0) in favor of the alternative hypothesis (H1), indicating evidence of a linear relationship. If |r| is less than or equal to the critical value, fail to reject the null hypothesis (H0), suggesting there is not enough evidence to support a linear relationship.
By following these steps, you can test the hypothesis and determine if there is evidence of a linear relationship between the given data points.

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order histograms a, b, and c from least to most variable. explain your reasoning. 5. between histograms d and e, which exhibits more variability? explain your reasoning.

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To order histograms a, b, and c from least to a most variable, we would need to look at the spread of the data in each histogram. In other words, we want to see how much the values in each histogram vary from one another.

Histogram A has a narrow peak and doesn't seem to have much variability - the values are all clustered relatively close together. Histogram b has a slightly wider peak and some values that are more spread out, so it exhibits more variability than a. Finally, histogram c has the widest peak and the most spread-out values, so it exhibits the most variability of the three. Therefore, we would order the histograms from least to a most variable as follows: a, b, c.

Step 1: Examine the range and shape of each histogram. Histograms with a smaller range and more uniform distribution will have lower variability, while histograms with a larger range and a more uneven distribution will have higher variability.

Step 2: Compare histograms A, B, and C. Observe the distribution of data and identify which has the smallest range, followed by the next smallest, and finally the largest range.

Step 3: After identifying the order, we can provide a concise explanation for the reasoning. For example, "Histogram A has the least variability because it has the smallest range and the most uniform distribution of data. Histogram B has more variability than A but less than C, as it has a slightly larger range and a less uniform distribution. Histogram C has the most variability due to its large range and highly uneven distribution of data."

For the second part of your question:

To determine which histogram (D or E) exhibits more variability, follow the same steps as above:

Step 1: Examine the range and shape of histograms D and E.

Step 2: Compare the two histograms to determine which has a larger range and a more uneven distribution of data.

Step 3: Explain your reasoning. For example, "Histogram D exhibits more variability than histogram E because it has a larger range and a more uneven distribution of data."

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The total attendance at a contemporary art museum is modeled by the function f(x) =14,020(1. 038)x. If the initial total attendance ( that is the total attendance when x=0) was measured January 1,2013, what was the initial total attendance?

Answers

The initial total attendance when x = 0 (or January 1, 2013) was 14,020 where The total attendance at a contemporary art museum is modeled by the function f(x) =14,020(1. 038)x.

The function [tex]f(x) = 14,020(1.038)^x[/tex] represents the total attendance at the contemporary art museum as a function of time, where x represents the number of years since January 1, 2013.

To find the initial total attendance, we need to evaluate the function when x = 0, since this represents the starting point or initial time. So, we plug in x = 0 into the function:

[tex]f(0) = 14,020(1.038)^0[/tex] = 14,020(1) = 14,020

Therefore, the initial total attendance when x = 0 (or January 1, 2013) was 14,020.

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please help me, i need help on my homework, explain well please

Answers

Answer:

d. minimum, 3/2

e. maximum, 0

f. maximum, 8/5

Step-by-step explanation:

Pre-Solving

We are given the following functions:

d. k(x) = 5x²-15x-50

e. j(x)=12-3x²

f. s(x)=-5x²+16x

We want to find the extremum (i.e. minimum or maximum value) and the x value of the extremum for each of the following functions.

Solving

If the coefficient of x² is positive, then the extremum will be a minimum

If the coefficient of x² is negative, then the extremum will be a maximum.

This means that for k(x)=5x²-15x-50, its extremum will be a minimum, since 5 is positive.

For j(x)=12-3x², this can be rewritten as j(x)= -3x² + 12, so its extremum will be a maximum, since -3 is negative.

For s(x)=-5x²+16x, its extremum will be a maximum, since -5 is negative.

Now, to find the value of x, we can use the formula -b/2a, where b is the coefficient of x, and a is the coefficient of x².

So, for k(x)=5x²-15x-50, it will be 15/2(5) = 15/10 = 3/2.

For j(x)=12-3x² (which is j(x)=-3x²+12), the coefficient in front of x is 0. This means it will be 0/2(-3)=0/-6=0.

For s(x)=-5x²+16x, it will be 16/2(-5)=16/-10=-8/5.

the 2004 presidential election exit polls from the critical state of ohio provided the following results. there were 2020 respondents in the exit polls and 750 wre college graduates. of thecollege graduates, 480 voted for george bush. construct a 97% two sided confidence interval for the proportion of college graduates in ohio that voted for george bush.

Answers

We can be 97% confident that the true proportion of college graduates in Ohio who voted for George Bush in the 2004 presidential election lies between 0.59 and 0.69.

To construct the confidence interval, we first need to calculate the sample proportion of college graduates in Ohio who voted for George Bush:

P = 480/750 = 0.64

Next, we need to calculate the standard error of the sample proportion:

SE = [tex]\sqrt{}[/tex]((P(1-P))/n) = [tex]\sqrt{}[/tex]((0.64 x 0.36)/750) = 0.025

To construct a two-sided confidence interval with a confidence level of 97%, we need to find the critical values from the t-distribution with degrees of freedom equal to the sample size minus 1:

t* = t(0.015, 749) ≈ 2.356

where t(0.015, 749) represents the 0.015th percentile of the t-distribution with 749 degrees of freedom. We use the 0.015th percentile instead of the 0.025th percentile because we are constructing a two-sided confidence interval.

Finally, we can construct the confidence interval using the formula:

P ± t*SE

Substituting the values, we get:

0.64 ± 2.356 x 0.025

Simplifying, we get:

(0.59, 0.69)

Therefore, we can be 97% confident that the true proportion of college graduates in Ohio who voted for George Bush in the 2004 presidential election lies between 0.59 and 0.69.

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Use the Comparison Test to determine whether the series converges. 1 Σ 6k - V k = 1 Choose the correct answer below. O A. The Comparison Test with shows that the series diverges. 1 OB. The Comparison Test with shows that the series diverges. 6k 1 O c. The Comparison Test with shows that the series converges. VK 1 OD. The Comparison Test with 6k shows that the series converges.

Answers

The correct answer is A. The Comparison Test with Σ 6k shows that the series diverges.

To use the Comparison Test, we need to compare the given series with a known convergent or divergent series. The given series is:

Σ (6k - √k) from k = 1 to infinity.

First, let's consider the series Σ 6k. We know that this is a divergent series since it is a sum of a linear function of k (arithmetic series). Now, let's compare the given series with Σ 6k.
For all k ≥ 1, we have:
6k - √k ≤ 6k

Since the series Σ 6k is a divergent series and the given series is term-wise greater than or equal to Σ 6k, we can apply the Comparison Test to conclude that the given series also diverges.

So the correct answer is A. The Comparison Test with Σ 6k shows that the series diverges.

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If you deposit $300 in an account and it grows by 6%
each year, how much money will be in your account
after 1 year?

Answers

Answer: $318

Step-by-step explanation:

Since the account grow by 6% every year, we want to find 6% of 300: 300*0.06=18

Then add this to 300 to find the total amount of money in the account: 300+18=318

Answer: $318

The demand equation for video games is given by x = 960 − 30p where x is the number of video games and p is in dollars. Find the value of p that maximizes the total revenue. $14 $17 $20 $18 $19

Answers

The value of p that maximizes the total revenue is $17.

How to find the value of p that maximizes the total revenue?

To find the value of p that maximizes the total revenue for the demand equation x = 960 - 30p, we need to first determine the revenue equation and then find the value of p that maximizes it.

Step 1: Determine the revenue equation.
Revenue (R) is equal to the price (p) multiplied by the number of video games sold (x). Therefore, the revenue equation is:
R = px

Step 2: Substitute the demand equation into the revenue equation.
Since x = 960 - 30p, we can substitute this into the revenue equation:
R = p(960 - 30p)

Step 3: Simplify the revenue equation.
R = 960p - 30p^2

Step 4: Maximize the revenue equation.
To find the maximum value of R, we can find the vertex of the quadratic equation. The vertex is given by the formula:
p_vertex = -b / 2a, where a = -30 and b = 960.

p_vertex = -960 / (2 * -30) = 960 / 60 = 16

Step 5: Determine the value of p that maximizes revenue.
The closest value to 16 among the given options is $17. Therefore, the value of p that maximizes the total revenue is $17.

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A commonly prescribed drug in the market for relieving the nervous tension is believed to be 60% effective. A new drug in the market was administered to a random sample of 100 patients suffering from the nervous tension showed that 70 were relieved from the nervous tension. Is there any sufficient evidence to conclude that the new drug is more superior than the commonly prescribed one at 5% level of significance.

Answers

We can recommend using the new drug for relieving nervous tension.

To determine whether there is sufficient evidence to conclude that the new drug is more effective than the commonly prescribed one, we need to perform a hypothesis test.

Let's denote the proportion of patients relieved from nervous tension by the commonly prescribed drug as p1 and the proportion of patients relieved from nervous tension by the new drug as p2.

The null hypothesis is that the new drug is not more effective than the commonly prescribed drug, or p2 ≤ p1.

The alternative hypothesis is that the new drug is more effective than the commonly prescribed drug, or p2 > p1.

We will use a significance level of 0.05.

Now, we can calculate the test statistic, which is given by:

z = (p2 - p1) / sqrt(P(1 - P)(1/n1 + 1/n2))

where p = (x1 + x2) / (n1 + n2) is the pooled sample proportion, x1 and x2 are the number of patients relieved from nervous tension in the two samples, and n1 and n2 are the sample sizes.

Plugging in the values from the problem, we get:

P = (70 + 60) / (100 + 100) = 0.65

z = (0.7 - 0.6) / sqrt(0.65 * 0.35 * (1/100 + 1/100)) = 1.73

Using a z-table or calculator, we can find that the p-value associated with a z-value of 1.73 is approximately 0.04.

Since the p-value is less than the significance level of 0.05, we can reject the null hypothesis and conclude that there is sufficient evidence to suggest that the new drug is more effective than the commonly prescribed one at the 5% level of significance.

Therefore, we can recommend using the new drug for relieving nervous tension.

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An account earns simple interest.
$2000 at 3.5% for 4 years
a. Find the interest earned.
b. Find the balance of the account.

Answers

With given simple interest, the interest earned is $280 and the balance of the account after 4 years is $2280.

What is simple interest?

Simple interest is a way of calculating interest on a loan or investment that just considers the initial principle amount. Simply said, simple interest is a fixed percentage of the principle amount that is added to the initial amount over time.

I = P * r * t is the formula for simple interest.

Now,

a. The interest earned can be found using the formula:

I = P * r * t

Where I is the interest earned, P is the principal amount, r is the interest rate per year as a decimal, and t is the time in years.

In this case, P = $2000, r = 0.035, and t = 4.

I = 2000 * 0.035 * 4 = $280

Therefore, the interest earned on the sum is $280.

b. The balance of the account after 4 years can be found by adding the interest earned to the principal:

Balance = Principal + Interest

Balance = $2000 + $280 = $2280

Therefore, the balance of the account after 4 years is $2280.

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Find the points on the surface xy - z^2 = 1 that are closest to the origin. Consider f(x, y) = e2xy sin z. Find the rate of change of the function f(x, y, z) at the point P(0, 1, pi/4) in the direction of the vector u = (1, 1, 0). In which direction does the function f(x, y, z) increase most rapidly at the point P(0, 1, pi/4)? What is the maximum rate of change of f(x, y, z) at the point P(0, 1, pi/4)? Let f(x, y) = 4x^2e^y - 2x^4 -e^4y. Find all critical points of f(x, y) and determine their nature (local max or local min or saddle point).

Answers

The maximum rate of change of f at P is 1.

To find the points on the surface xy - z^2 = 1 that are closest to the origin, we can use the method of Lagrange multipliers. Let's define the function g(x, y, z) = x^2 + y^2 + z^2, which is the square of the distance from the origin. Our constraint is the surface xy - z^2 = 1. The Lagrangian function is then:

L(x, y, z, λ) = e^(2xy)sin(z) + λ(xy - z^2 - 1)

Taking partial derivatives and setting them equal to zero, we get:

∂L/∂x = 2ye^(2xy)sin(z) + λy = 0

∂L/∂y = 2xe^(2xy)sin(z) + λx = 0

∂L/∂z = e^(2xy)cos(z) - 2λz = 0

∂L/∂λ = xy - z^2 - 1 = 0

Solving these equations, we get:

x = ±√(2/π), y = ±√(2/π), z = ±1/√π

Plugging these values into g(x, y, z), we get the closest point to the origin: (±√(2/π), ±√(2/π), ±1/√π)

To find the rate of change of the function f(x, y, z) = e^(2xy)sin(z) at the point P(0, 1, π/4) in the direction of the vector u = (1, 1, 0), we can use the directional derivative formula:

D_u f(P) = ∇f(P) · u

where ∇f is the gradient of f. Evaluating at P, we get:

∇f(P) = (2y e^(2xy)cos(z), 2x e^(2xy)cos(z), e^(2xy)sin(z))|_(0,1,π/4) = (√2/2, √2/2, 1/√2)

D_u f(P) = (√2/2, √2/2, 1/√2) · (1, 1, 0) = √2

Therefore, the rate of change of f in the direction of u at P is √2.

To find the direction in which f increases most rapidly at P, we need to find the unit vector in the direction of ∇f(P). This is given by:

u_max = ∇f(P)/||∇f(P)|| = (√2/2, √2/2, 1/√2) / ||(√2/2, √2/2, 1/√2)|| = (1/√3, 1/√3, 1/√3)

Therefore, the function f increases most rapidly at P in the direction of the vector u_max = (1/√3, 1/√3, 1/√3).

The maximum rate of change of f at P is ||∇f(P)||, which is:

||∇f(P)|| = ||(√2/2, √2/2, 1/√2)|| = 1

Therefore, the maximum rate of change of f at P is 1.

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The height of three Russian dolls are in the ratio 7:12:17.
Rewrite this as an equivalent ratio of tye form 1:m:n.
Give any decimal in your answer in 2 d.p

Answers

Rewriting the ratio as an equivalent ratio of 1 : m ; n is 1 : 12/7 : 17/7

Rewriting the ratio as an equivalent ratio

From the question, we have the following parameters that can be used in our computation:

The height of three Russian dolls are in the ratio 7:12:17.

So, we have

Ratio = 7:12:17

The form is given as 1:m:n.

So, we divide through the ratio by 7

So, we have

Ratio = 1 : 12/7 : 17/7

Hence, the equivalent form is 1 : 12/7 : 17/7

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Julia is making a mold for creating cone-shaped candles. She starts with a cylindrical piece of wood and carves out a cone-shaped section. What is the approximate volume of the solid portion of the mold? Use 3.14 for π.

Answers

Answer:

395.64 [tex]inches^{3}[/tex]

Step-by-step explanation:

We would take the volume of the cylinder and subtract out the cone.

Cylinder:

a = [tex]\pi r^{2}[/tex]h

a = (3.14)([tex]3^{2}[/tex])(18)

a = 508.68

Cone:

a = [tex]\frac{1}{3}[/tex][tex]\pi r^{2}[/tex]h  This is 1/3 of the cylinder that would encase the cone.

a = [tex]\frac{(3.14)(9)(12)}{3}[/tex]

a = 113.04

Subtract the cone from the cylinder to find the solid part of the mold.

508.68 - 113.04 = 395.64

Helping in the name of Jesus.

A 35-year-old person who wants to retire at age 65 starts a yearly retirement contribution in the amount of $5,000. The retirement account is forecasted to average a 6.5% annual rate of return, yielding a total balance of $431,874.32 at retirement age.

If this person had started with the same yearly contribution at age 25, what would be the difference in the account balances?

A spreadsheet was used to calculate the correct answer. Your answer may vary slightly depending on the technology used.

Answers

If the person had started with the same yearly contribution of $5,000 at age 25, the account balance at retirement age would have been $1,092,424.68 - $431,874.32 = $660,550.36 higher than if they had started at age 35.

What is annual rate of return?

Annual rate of return is the rate of return earned on an investment over a period of one year. It is expressed as a percentage and is used to calculate the amount of return earned on an investment based on the amount of money invested.

If the person started with the same yearly contribution of $5,000 at age 25, they would have made contributions for 40 years, instead of 30 years.

Using the same 6.5% annual rate of return, we can calculate the account balance at retirement age as:

FV = PMT × [tex]\frac{ (1 + r)^{n} - 1}{r} + PV * (1 + r)^{n}[/tex]

where FV is the future value, PMT is the yearly payment, r is the annual interest rate, n is the number of years, and PV is the present value (which is 0 in this case since the person is starting from scratch).

So, for a 40-year contribution period, we have:

FV = $5,000 × [tex]\frac{ (1 + 0.065)^{40} - 1}{0.065} + 0* (1 + 0.065)^{40}[/tex]

FV = $5,000 × 218.485 + $0

FV = $1,092,424.68

Therefore, if the person had started with the same yearly contribution of $5,000 at age 25, the account balance at retirement age would have been $1,092,424.68 - $431,874.32 = $660,550.36 higher than if they had started at age 35.

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The radius of a circle is increased from 4.00 to 4.08m. Estimate the resulting change in area, and then express the estimate as a percentage of the circle's original area.

Answers

a) The resulting change in area when the radius of a circle is increased from 4.00 to 4.08m is approximately 0.020106π square meters.

b) This change in area is approximately 1.25% of the circle's original area.

The formula for the area of a circle is A = πr^2, where A is the area and r is the radius. To estimate the change in area when the radius is increased from 4.00 to 4.08m, we can use the following equation

ΔA ≈ A2 - A1

ΔA ≈ π(r2^2 - r1^2)

ΔA ≈ π[(4.08)^2 - (4.00)^2]

ΔA ≈ π[0.0064]

ΔA ≈ 0.020106π square meters.

So the change in area is approximately 0.020106π square meters.

To express this change as a percentage of the circle's original area, we need to divide the change in area by the original area and multiply by 100

ΔA/A1 ≈ (0.020106π)/(π(4.00)^2)

ΔA/A1 ≈ 0.0125

Multiplying by 100, we get

ΔA/A1 ≈ 1.25%

So the resulting change in area is approximately 1.25% of the circle's original area.

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In this problem you will use variation of parameters to solve the nonhomogeneous equation y" – 4y' + 4y = -6e2t. Write the characteristic equation for the associated homogeneous equation. (User for your variable.)

Answers

The general Solution to the homogeneous differential equation is:

[tex]y_h(t) = c1 e^{(2t)} + c2 t e^{(2t)[/tex]

The characteristic Equation for the associated homogeneous equation y" – 4y' + 4y = 0

can be found by assuming a solution of the form

[tex]y = e^{(rt)[/tex], where r is a constant.

Substituting this into the differential equation, we get:

[tex]r^2 e^{(rt)} - 4r e^{(rt)} + 4 e^{(rt)} = 0[/tex]

Dividing both sides by e^(rt), we get:

r^2 - 4r + 4 = 0

This is a quadratic equation that can be factored as:

(r - 2)^2 = 0

Therefore, the characteristic equation is:

(r - 2)^2 = 0

Simplifying this, we get:

r = 2 (with multiplicity 2)

So the general solution to the homogeneous equation is:

[tex]y_h(t) = c1 e^{(2t)} + c2 t e^{(2t)[/tex]

where c1 and c2 are constants that are determined by initial conditions.

Note that we found the characteristic equation by assuming a solution of the form y = e^(rt). This is a common technique for finding solutions to homogeneous linear differential equations with constant coefficients.

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Alex wants to display categorical data of popular music genres from a survet in a circle graph. country represents 35% of the data , and alex draws a 35 angle to construct this section on the circle graph, is alex corret? Justify your answer.

Answers

Yes, Alex is correct as 35% of the circle will be created when a 35 angle is made in the circle. The survey shows 35% which we have to represent on the circle graph.

Define a circle graph or a pie chart?

A pie chart is a type of graph that separates the data into sectors to show each sector's data as a percentage of the overall data and employs circular data recording. Each of these slices or segments represents a proportionate piece of the whole. Pie charts, also known as pie diagrams, make it easier to grasp and convey the data.

Here in the question,

Alex is correct as 35% of the circle will be created when a 35 angle is made in the circle. The survey shows 35% which we have to represent on the circle graph.

The part created or shaded by the 35 angle in the circle graph will represent the 35% of the result that shows in the survey.

As out of 100 the country represents 35% of the data.

So, if we assume the circle graph to be 100, than a 35 angle made will represent the data we have surveyed.

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Find a parametric representation for the upper half of the ellipsoid 4x2+2y2+z2=1.

Answers

The representation that describes the upper half of the ellipsoid 4x^2 + 2y^2 + z^2 = 1 using the parameters u and v, where 0 ≤ u ≤ 2π and 0 ≤ v ≤ 1.



To find a parametric representation for the upper half of the ellipsoid 4x^2 + 2y^2 + z^2 = 1, we will parameterize the variables x, y, and z using two parameters, u and v. Since we only want the upper half of the ellipsoid, we need to ensure z is non-negative.

Parameterize the x and y variables using the parameter u.
Let x = (1/2)cos(u) and y = (1/√2)sin(u). This way, 4x^2 + 2y^2 = 4(1/4)cos^2(u) + 2(1/2)sin^2(u) = cos^2(u) + sin^2(u) = 1.

Parameterize the z variable using the parameter v.
Since we want the upper half of the ellipsoid, let z = v, where 0 ≤ v ≤ 1.

Combine the parameterizations.
The parametric representation of the upper half of the ellipsoid is given by the vector function:
r(u, v) = ((1/2)cos(u), (1/√2)sin(u), v)

This representation describes the upper half of the ellipsoid 4x^2 + 2y^2 + z^2 = 1 using the parameters u and v, where 0 ≤ u ≤ 2π and 0 ≤ v ≤ 1.

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need help just the answer will be good

Answers

Answer:

50°

Step-by-step explanation:

The two red dashes indicate that the side lengths are the same. Since they are the same length, they are going to make the same angle with the third side. Since we already know that one of the angles is 80°, and a triangle has 180°, we can conclude that the other two angles add up to 100°.

Since there are two angles, and they are equal, we can do;

100°/2 = 50°.

This is the value of x.

Area Dissections
I tried to figure this out so many times, it’s problem #6

Answers

Step-by-step explanation:

#6

it is an isoceles trapezoid minus the inner circle with radius 1 mile (half of the given diameter of 2 miles).

the area of the trapezoid is

height × (long baseline + short baseline)/2 =

= 2 × (4 + 2)/2 = 4 + 2 = 6 mi²

the area of the circle is

pi×r² = pi×1² = pi mi²

the shaded area is then

6 - pi mi² ≈ 6 - 3.14 mi² ≈ 2.86 mi²

and to be safe

#5

it is the circle minus the rectangle.

the area of the circle is

pi×r² = pi×6² = 36pi mm² ≈ 36×3.14 ≈ 113.04 mm²

the area of the rectangle is

10×1.5 = 15 mm²

the shaded area is then about

113.04 - 15 = 98.04 mm²

A circle has a radius of 2.2. What is its circumference?

Answers

Answer:

Step-by-step explanation:

[tex]C=2\pi r[/tex]

   [tex]=2\times \pi \times 2.2[/tex]

   [tex]=4.4\pi[/tex]

   [tex]=13.82[/tex]

the circumference of the circle is 13.82

Monica uses 2 pounds of apples,32 ounces of flour, and 1/2 pounds of walnuts to bake apple walnuts muffins. How many ounces do the ingredients weigh in all

Answers

Answer:

72 ounces in all.

Step-by-step explanation:

If you want to know how much your ingredients weigh in ounces, you have to do some math. Don't worry, it's not hard. You just need to remember that one pound is 16 ounces. That's easy, right? Just think of a pound cake. It's called that because it has 16 ounces of butter, sugar, eggs and flour. Each. That's a lot of cake!

So, to convert pounds to ounces, you just multiply by 16. For example, if you have 2 pounds of apples, you multiply 2 by 16 and get 32 ounces of apples. If you have half a pound of walnuts, you multiply 0.5 by 16 and get 8 ounces of walnuts. See? It's simple.

Now, to find the total weight of your ingredients in ounces, you just add them up. For example, if you have 32 ounces of apples, 32 ounces of flour and 8 ounces of walnuts, you add 32 + 32 + 8 and get 72 ounces. That's how much your ingredients weigh in total. Congratulations! You just did some baking math!

But wait, there's more! Did you know that an ounce is also a unit of volume? It's true! One fluid ounce is equal to about 30 milliliters. That means you can also measure liquids in ounces. For example, if you want to make a cup of tea, you need 8 fluid ounces of water. That's about 240 milliliters. Isn't that neat?

But don't get confused! Fluid ounces and weight ounces are not the same thing. They are different units of measurement. You can't use them interchangeably. For example, if you have 8 fluid ounces of honey, that doesn't mean you have 8 weight ounces of honey. Honey is denser than water, so it weighs more per volume. In fact, 8 fluid ounces of honey weigh about 12 weight ounces. That's a big difference!

So remember: when you are measuring ingredients in ounces, make sure you know what kind of ounce you are using: weight or volume. And don't forget to convert pounds to ounces by multiplying by 16. That way, you can always bake with confidence and accuracy.

✧☆*: .。. That's all folks, have fun with math! (✧ω✧) .。.:*☆✧

Using the discriminant, the following quadratic equation y=-x^2-5 has ___ solutions

Answers

Answer: -124

- 1: Simplifying the given quadratic equation

                 ⇒ (x + 5)

2

 = 2(5x - 3)

                 ⇒ x

2

 + 10x + 25 = 10x - 6                        [∵(a+b)

2

=a

2

+2ab+b

2

]

                 ⇒ x

2

 + 31 = 0

Step - 2: Calculating discriminant using formula

                 Here a = 1, b = 0 and c = 31

                 ⇒ D = 0 - (4×1×31)

                 ⇒ D = - 124

Hence Discriminant of the given quadratic equation is - 124.

Convert -8x = 3x^2 – 9 to standard form.

Answers

The standard form representation of the give quadratic equation; -8x = 3x² - 9 as required is; 3x² + 8x - 9 = 0.

What is the standard form representation of the equation?

It follows from the task content that the standard form representation of the given quadratic equation; -8x = 3x² - 9 is to be determined.

Recall the standard form equation of quadratic equations takes the form; ax² + bx + c = 0.

Therefore, for the given equation; we have that;

-8x = 3x² - 9

0 = 3x² + 8x - 9

3x² + 8x - 9 = 0.

Ultimately, the standard form equation is; 3x² + 8x - 9 = 0.

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Help me with this!?!

In order to solve a system by substitution, you want to...

get opposite coefficients for each variable in each equation.

get opposite coefficients for one set of variables in each equation.

isolate a variable in an equation and then substitute into the other equation.

put the corresponding augmented matrix into RREF (row reduced echelon form).

Answers

Answer:

Step-by-step explanation:

1. Solve one of the equations for one of the variables. For example, if the system is:

x + 2y = 7

3x - 4y = -2

2. You could solve the first equation for x by subtracting 2y from both sides:

x = 7 - 2y

3. Substitute the expression for the variable you solved for in step 1 into the other equation. For example, substituting x = 7 - 2y into the second equation gives:

3(7 - 2y) - 4y = -2

4. Simplify and solve for the remaining variable. Using the example from step 2, you would simplify the equation as follows:

21 - 6y - 4y = -2

21 - 10y = -2

-10y = -23

y = 23/10

5. Substitute the value of the variable you found in step 3 back into one of the original equations to solve for the other variable. Using the example from step 1, you would substitute y = 23/10 into x = 7 - 2y:

x = 7 - 2(23/10)

x = -9/5

6. Check your solution by substituting the values you found for x and y into both of the original equations. If the values satisfy both equations, then you have found the correct solution.

x + 2y = 7 becomes (-9/5) + 2(23/10) = 7, which is true

3x - 4y = -2 becomes 3(-9/5) - 4(23/10) = -2, which is also true

Therefore, the solution to the system of equations is x = -9/5 and y = 23/10.

if p(x) is the taylor series for f centered at 0, then p( x - 1 ) is the taylor series for f centered at 1. True or False

Answers

True. If p(x) is the Taylor series for f centered at 0, then p(x-1) is not the Taylor series for f centered at 1. Instead, to obtain the Taylor series for f centered at 1, you would need to compute a new series with the center shifted to 1.

True. Shifting the center of a Taylor series by adding or subtracting a constant simply results in a new Taylor series centered at the shifted point. In this case, we are shifting the center from 0 to 1 by replacing x with (x-1) in the Taylor series for f, resulting in p(x-1).
In mathematics, the Taylor series or Taylor expansion of a function is an infinite number of points defined by the function at one point. For most ordinary functions, the partial function and its Taylor series are equal at point. The first n + 1 terms of the Taylor series form an n-order polynomial called the nth-order Taylor polynomial function. Taylor polynomials are generally approximate for functions that get better as n increases. Taylor's theorem provides a quantitative estimate of the resulting error using this approach. If the series of Taylor functions converge, the sum is the limit of an infinite number of Taylor polynomials.

A function can diverge from the equation of the Taylor series even if the Taylor series converges. A function is the definition of a point x if it is equal to the sum of the Taylor series over an open interval (or opening in the complex plane) containing x. This means that transactions are resolved anywhere on the clock (or disk).

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4/10 in simplest terms/ simplified

Answers

Answer:

2/5

Step-by-step explanation:

divide 4 by and the 10 by two.

Answer: 2/5

Step-by-step explanation:

To simplify a fraction you can divide the top and bottom by the same number as long as it goes in evenly

[tex]\frac{4/2}{10/2} =\frac{2}{5}[/tex]

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