what are the relationships of numerator and denominator coefficients with r, l, and c values of a circuit?

Answers

Answer 1

The relationships between the numerator and denominator coefficients of a circuit and the values of resistance (R), inductance (L), and capacitance (C) depend on the specific circuit configuration and the transfer function associated with it.

In general, the numerator coefficients of the transfer function represent the output variables of the circuit, while the denominator coefficients represent the input variables. The coefficients are determined by the circuit elements (R, L, C) and their interconnections.

For example, in a simple RC circuit (resistor and capacitor), the transfer function can be written as a ratio of polynomials in the Laplace domain. The denominator coefficients correspond to the characteristic equation of the circuit and involve the resistance and capacitance values. The numerator coefficients may be related to the initial conditions or external inputs.

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Related Questions

How do I do this please help

Answers

Answer:

C is the correct answer.

the population, p, of a species of fish is decreasing at a rate that is proportional to the population itself. if p=400000 when t=2 and p=350000 when t=4, what is the population when t=10?

Answers

The population when t=10 is approximately 281943.6.

This problem can be modeled by the following differential equation:

dp/dt = -k*p, where k is a constant of proportionality.

The general solution to this differential equation is:

p(t) = [tex]Ce^{(-k*t)}[/tex], where C is a constant of integration.

We can use the given initial conditions to find the values of C and k.

p(2) = 400000 = [tex]Ce^{(-2k)}[/tex]

p(4) = 350000 = [tex]Ce^{(-4k)}[/tex]

Dividing these equations, we get:

400000/350000 = [tex]e^{(2k)}[/tex]

ln(400000/350000) = 2k

k = ln(400000/350000) / 2

k ≈ 0.0436

Substituting this value of k into one of the initial conditions, we get:

400000 = [tex]Ce^{(-2*0.0436)}[/tex]

C ≈ 496277.4

Therefore, the population function is:

p(t) = 496277.4 [tex]e^{(-0.0436*t)}[/tex]

To find the population when t=10, we can substitute t=10 into this function:

p(10) = 496277.4[tex]e^{(-0.0436*10)}[/tex] ≈ 281943.6

Therefore, the population when t=10 is approximately 281943.6.

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Given that f(x)=2/x2 what is the value of f(x) when x=2?

A. 2.5
B. 2
C. 1
D. 0.5

Answers

Answer:

When x=2, we have:

f(2) = 2/2^2 = 2/4 = 0.5

Therefore, the value of f(x) when x=2 is 0.5.

The answer is (D) 0.5.

PLEASE HELP WILL MARK BRAINLIEST!!!

Answers

Answer:

t₁₀ = 12.8S₁₀ = 119

Step-by-step explanation:

You want the 10th term and sum for the arithmetic series with t₄ = 11.6 and t₈ = 12.4.

Common difference

The term t₈ will be greater than the term t₄ by 4 times the common difference:

  4d = t₈ -t₄ = 12.4 -11.6 = 0.8

  d = 0.8/4 = 0.2

Terms of interest

The first term will be less than the 4th term by 3 times the common difference:

  t₁ = t₄ -3d = 11.6 -3(0.2) = 11.0

The 10th term will be more than the 8th term by 2 times the common difference:

  t₁₀ = t₈ +2d = 12.4 +2(0.2) = 12.8

The 10th term is 12.8.

Sum

The sum of 10 terms will be the mean of the first and last, multiplied by the number of terms.

  S₁₀ = (t₁ +t₁₀)/2 · 10 = 5(11 +12.8) = 5(23.8) = 119

The sum of 10 terms is 119.

__

Additional comment

The attachment shows the first 10 terms of the series, along with their sum. You can see the 4th and 10th terms match the problem statement.

<9514104393>

when we run a oneway analysis of variance, we are partitioning the ______________ into two meaningful parts.

Answers

We are partitioning the total variance into two meaningful parts.

What is the variance?

In probability theory and statistics, variance is defined as a random variable's squared deviation from its mean. The variance is frequently expressed as the square of the standard deviation. Variance is a measure of dispersion, which means it measures how far apart a set of numbers is from their average value.

Here,

We have two potential sources of variance in our data in a one-way ANOVA: among-groups and within-groups.

The variation among our groups is known as the explained variation because the element that accounts for it is rock type. We also have variation inside our groups, that is, variation among the replicates within each group, which is known as unexplained variation because it cannot be attributed to a component.

ANOVA divides the variability among all values into two components: one due to variability among group means (due to treatment) and the other due to variability within groups (also known as residual variation).

Hence, we are partitioning the total variance into two meaningful parts.

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find equations of the tangents to the curve x = 6t2 6, y = 4t3 2 that pass through the point (12, 6). (enter your answers as a comma-separated list.)

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The equations of the tangents to the curve x = 6t² + 6, y = 4t³ + 2 that pass through the point (12,6)

To find the equations of the tangents, we need to first find the point(s) on the curve that pass through the point (12,6).

Let's solve for t in terms of x:

x = 6t² + 6

t² = (x - 6)/6

t = ± sqrt((x - 6)/6)

Next, we substitute this expression for t into the equation for y:

y = 4t³ + 2

[tex]y = 4[(x - 6)/6]^{(3/2)}+ 2[/tex]

Now we have an equation for the curve in terms of x and y. To find the tangent lines that pass through (12,6), we can use the point-slope form of the equation of a line:

y - 6 = m(x - 12)

where m is the slope of the tangent line. To find m, we take the derivative of y with respect to x:

dy/dx = 2sqrt((x - 6)/6)

We can evaluate this derivative at x = 12 to get the slope of the tangent line:

dy/dx|x=12 = 2sqrt(1/2) = sqrt(2)

So the equation of the tangent line passing through (12,6) is:

y - 6 = sqrt(2)(x - 12)

To find the other tangent line, we need to use the negative square root of (x-6)/6 in the equation for t:

t = -sqrt((x - 6)/6)

Then we substitute this into the equation for y:

y = 4t^3 + 2

y = -4[(x - 6)/6]^(3/2) + 2

We repeat the same process to find the equation of the tangent line passing through (12,6):

dy/dx = -2sqrt((x - 6)/6)

dy/dx|x=12 = -2sqrt(1/2) = -sqrt(2)

So the equation of the other tangent line passing through (12,6) is:

y - 6 = -sqrt(2)(x - 12)

Therefore, the equations of the tangents to the curve x = 6t² + 6, y = 4t³ + 2 that pass through the point (12,6) are:

y - 6 = sqrt(2)(x - 12), y - 6 = -sqrt(2)(x - 12)

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How many times does $1 need to double in value to become $2,000,000? Explain how you know.

Answers

$1 needs to double approximately 20.93 times to reach $2,000,000.

How to find How many times does $1 need to double in value to become $2,000,000

Using the concept of exponential growth.

[tex]1 * 2^x = 2,000,000[/tex]

Here, "x" represents the number of times $1 needs to double, and 2^x represents the result of doubling $1 x number of times.

Now, we can solve for "x" by taking the logarithm base 2 of both sides of the equation:

[tex]log2(1 * 2^x) = log2(2,000,000)[/tex]

Using the logarithmic property, we can simplify the equation:

[tex]log2(1) + log2(2^x) = log2(2,000,000)[/tex]

[tex]0 + x * log2(2) = log2(2,000,000)[/tex]

x = log2(2,000,000) / log2(2)

Calculating the result:

x ≈ 20.93

Therefore, $1 needs to double approximately 20.93 times to reach $2,000,000.

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find the area of the region. inside r = 2a cos() and outside r = a

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The area of the region between the two circles r = 2a cos(θ) and r = a is [tex]a^{2}[/tex] (√3 - π)/2.

We are given two polar curves:

r1 = 2a cos(θ) - equation of an inner circle

r2 = a - equation of an outer circle

To find the area of the region between these two curves, we need to integrate the area of an infinitesimal sector and sum up all such sectors from θ = 0 to θ = 2π.

Let us first find the intersection points of the two curves:

2a cos(θ) = a

cos(θ) = 1/2

θ = π/3, 5π/3

Now, we can set up the integral for the area as follows:

A = ∫ [tex]\frac{(r1^2 - r2^2)}{2}[/tex]dθ (over the interval π/3 ≤ θ ≤ 5π/3)

= ∫[4[tex]a^{2}[/tex]  [tex]cos^{2}[/tex](θ) - [tex]a^{2}[/tex] ]/2 dθ

= [2[tex]a^{2}[/tex]  (2sin(θ)cos(θ)) - a^2θ]/2 |π/3 to 5π/3

= [2[tex]a^{2}[/tex] (√3) - a^2π]/2

= [tex]a^{2}[/tex] (√3 - π)/2

Therefore, the area of the region between the two circles r = 2a cos(θ) and r = a is [tex]a^{2}[/tex] (√3 - π)/2.

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the study of hypnosis and its relationship to hysteria was the starting point for

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The study of hypnosis and its relationship to hysteria was the starting point for the development of psychoanalysis by Sigmund Freud.

The study of hypnosis and hysteria in the late 19th century by Sigmund Freud and his contemporaries led to the development of psychoanalysis, a form of psychotherapy that emphasizes the role of unconscious thoughts and feelings in shaping behavior. Through his work with patients suffering from hysteria, Freud became interested in the idea that psychological conflicts could be traced back to early childhood experiences, and that these conflicts could be resolved through the exploration of unconscious thoughts and feelings. This eventually led to the development of psychoanalysis as a theory and practice for the treatment of psychological disorders.

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a piece of sheet metal is 2.5 times as long as it is wide. it is to be made into a box with an open top by cutting 3-in squares from each corner and folding up the sides. let x represent the width (in inches) of the original flat piece of metal. represent the length of the original piece of sheet metal in terms of x. what are the restrictions on x? determine a function v that represents the volume of the box in terms of x. for what values of x will the volume of the box be between 600 and 800in3? give values to the nearest tenth of an inch.

Answers

The length (L) of the original piece of sheet metal in terms of x is L = 2.5x, The restrictions on x are that it must be greater than 6 inches and less than or equal to 16 inches, The values of x that will give a box volume between 600 and 800 cubic inches are between 4.6 inches and 8.4 inches.

To find the volume of the box, we need to first find the height of the box. When the 3-inch squares are cut from each corner and the sides are folded up, the height of the box will be 3 inches. The width of the base of the box will be x - 2(3) = x - 6 inches, and the length of the base of the box will be 2.5x - 2(3) = 2.5x - 6 inches.

Therefore, the volume of the box will be:

V = (x - 6)(2.5x - 6)(3) = 7.5x² - 45x + 54

To find the values of x that will give a volume between 600 and 800 cubic inches, we can set up the inequality:

600 ≤ 7.5x² - 45x + 54 ≤ 800

Simplifying this inequality, we get:

0 ≤ 7.5x² - 45x + 54 - 600 ≤ 200

-594 ≤ 7.5x² - 45x - 546 ≤ -394

Dividing all sides by 7.5, we get

-79.2 ≤ x² - 6x - 72.8 ≤ -52.5

Adding 79.2 to all sides, we get:

0 ≤ x² - 6x + 6.4 ≤ 26.7

Completing the square, we get:

0 ≤ (x - 3)² - 2.6 ≤ 26.7

Adding 2.6 to all sides, we get:

2.6 ≤ (x - 3)² ≤ 29.3

Taking the square root of all sides, we get:

1.6 ≤ x - 3 ≤ 5.4

Adding 3 to all sides, we get:

4.6 ≤ x ≤ 8.4

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2y-13=-3y/5
find the value of x

Answers

The value of x in the equation 2y - 13 = -3y/5 is undefined and the value of y is 5

Finding the value of x in the equation

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

2y-13=-3y/5

Express properly

So, we have

2y - 13 = -3y/5

The above equation do not have any variable named "x"

This means that the equation cannot be solved for x and as such we can say that the value of x in the equation is undefined

However, we can solve for y as follows

2y - 13 = -3y/5

Collect the like terms

2y + 3y/5 = 13

Evaluate the like terms

2 3/5 y = 13

Divide both sides by 2 3/5

y = 5

So, the value of y is 5

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For each sequence given below, find a closed formula for an. the nth term of the sequence (assume the first terms are ao) by relating it to another sequence for which you already know the formula. In each case, briefly say how you got your answers. a. 4, 5, 7, 11, 19, 35, b. 0, 3, 8, 15, 24, 35,. c. 6, 12, 20, 30, 42,.. d. 0, 2, 7, 15, 26, 40, 57,.. (Cryptic Hint: these might be called*house numbers")

Answers

The closed formula for this sequence is an = 2^(n-2) + 2, where a0 = 4.

The closed formula for this sequence is an = n^2 - n, where a0 = 0.

The closed formula for this sequence is an = n(n + 1), where a0 = 6.

The closed formula for this sequence is an = n^2 - 1, where a0 = 0.

The sequence 4, 5, 7, 11, 19, 35 can be obtained by adding consecutive powers of 2. Starting from 4, each term is obtained by adding 2 raised to the power of n-2, where n is the position of the term in the sequence.

The sequence 0, 3, 8, 15, 24, 35 can be obtained by taking the square of consecutive integers. Starting from 0, each term is obtained by adding the square of n, where n is the position of the term in the sequence.

The sequence 6, 12, 20, 30, 42 can be obtained by multiplying consecutive integers by 6. Each term is obtained by multiplying n by (n + 1), where n is the position of the term in the sequence.

The sequence 0, 2, 7, 15, 26, 40, 57 can be obtained by adding consecutive odd numbers. Starting from 0, each term is obtained by adding the nth odd number, where n is the position of the term in the sequence.

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Find the surface area of the regular pyramid.
10 yd
9 yd
7.8 yd
lyd?

Answers

The surface area of the regular pyramid can be calculated using the formula: SA = (base area) + (0.5 × perimeter of base × slant height).

How can the surface area of a regular pyramid be determined using its base area and slant height?

The surface area of a regular pyramid is found by adding the base area to half the product of the perimeter of the base and the slant height. The base area is calculated by multiplying the length and width of the base, and the slant height is the distance between the apex (top) of the pyramid and the base along the slanting edges. By plugging in the given measurements, multiplying the base length and width, finding the perimeter of the base, and then substituting the values into the formula, the surface area of the regular pyramid can be determined.

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What is the least common denominator (LCD) for the following equation?


1/2x + 2/x = x/2

Answers

The least common denominator (LCD) of the equation 1/2x + 2/x = x/2 is equal to 2x

What is the least common denominator of a simple equation

The least common denominator (LCD) is a term commonly used in fractions. It refers to the smallest multiple that two or more denominators have in common.

Given the fractions of the equation:

1/2x + 2/x = x/2

The denominators of these fractions are 2x, x, and 2 respectively.

The multiples of 2x are: 2x, 4x, 6x,...

The multiples of x are: x, 2x, 6x,...

The multiples of 2 are: 2, 4, 6,...

The smallest multiple they have in common is 2x.

Therefore, the least common denominator (LCD) of the equation 1/2x + 2/x = x/2 is equal to 2x

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May 19, 8:07:56 AM
Unique ID: 0122
Watch help video
A shipping container is in the form of a right rectangular prism, with dimensions of
40 ft by 8 ft by 8 ft 6 in. How many cubic feet of shipped goods would it hold when
it's three-quarters full? Round your answer to the nearest tenth if necessary.
Answer:
ft ³
Submit Answer
10

Answers

The container would hold 2040 cubic feet of shipped goods when it's three-quarters full.

How to find How many cubic feet of shipped goods would it hold whenit's three-quarters full

The dimensions of the container are given as 40 ft by 8 ft by 8 ft 6 in. We need to convert the height of 8 ft 6 in to feet by dividing it by 12 since there are 12 inches in a foot:

8 ft 6 in = 8 ft + (6 in / 12) ft

         = 8 ft + 0.5 ft

         = 8.5 ft

Now we can calculate the volume of the container:

Volume = Length × Width × Height

      = 40 ft × 8 ft × 8.5 ft

      = 2720 ft³

To find the volume when the container is three-quarters full, we multiply the total volume by 0.75:

Volume when three-quarters full = 2720 ft³ × 0.75

                              = 2040 ft³

Therefore, the container would hold 2040 cubic feet of shipped goods when it's three-quarters full.

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How do I do this please help

Answers

Answer:

Step-by-step explanation:

A linear function will result in a straight line.  Thus, the difference between each x coordinate will be the same and the difference between each y coordinate will be the same.  

For example, in Table A, the difference for each X coordinate is  2 (9-7. 7-5, etc...).  

However, the difference between the Y coordinates is -2 until you reach the last one where 1-0 is -1 so it is not linear.  

Applying this to the other tables shows the linear function in Table C.

what are the translations to this equation? f(x)=-√3x-5 +2 (the 2 is outside of the square root and the -5 is inside of the square root)

Answers

Horizontal shift right 5
Vertical shift up 2

the image is my question

Answers

The value of the missing angle Q is: ∠Q = 112°

How to find supplementary and vertical angles?

Supplementary angles are defined as angles that sum up to 180 degrees. Meanwhile, Vertical angles are defined as angles that are opposite of each other when two lines cross. Vertical angles are. congruent, which tells us that that they have the same angle measure.

We are told that:

∠P and ∠Q are supplementary angles. Thus:

∠P + ∠Q = 180°

∠R = 68°

∠P and ∠R are vertical angles and as such:

∠P = ∠R = 68°

Thus:
68° + ∠Q = 180°

∠Q = 180° - 68°

∠Q = 112°

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The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 14 people reveals the mean yearly consumption to be 60 gallons with a standard deviation of 20 gallons. Assume that the population distribution is normal. (Use t Distribution Table.) a-1. What is the value of the population mean? Unknown 20 60 a-2. What is the best estimate of this value? Estimate population mean c. For a 95% confidence interval, what is the value of t? (Round your answer to 3 decimal places.) Value of t d. Develop the 95% confidence interval for the population mean. (Round your answers to 3 decimal places.) Confidence interval for the population mean is and . e. Would it be reasonable to conclude that the population mean is 52 gallons? Yes It is not possible to tell

Answers

Rounded to 3 decimal places, the 95% confidence interval for the population mean is approximately (48.450, 71.550).

What is confidence interval?

A confidence interval is a range of values that is used to estimate an unknown population parameter based on sample data. It provides a measure of the uncertainty or variability associated with the estimation. The confidence interval consists of two numbers, an upper bound and a lower bound, which define a range within which the true population parameter is likely to fall.

a-1. The value of the population mean is unknown. We are trying to estimate it using the sample data.

a-2. The best estimate of the population mean is the sample mean, which is 60 gallons.

c. For a 95% confidence interval, we need to find the value of t with (n-1) degrees of freedom. In this case, the sample size is 14, so the degrees of freedom is 14 - 1 = 13. Consulting the t-distribution table or using a statistical calculator, the value of t for a 95% confidence level with 13 degrees of freedom is approximately 2.160.

d. To develop the 95% confidence interval for the population mean, we can use the formula:

Confidence Interval = Sample Mean ± (t * Standard Error)

Standard Error = Standard Deviation / √Sample Size

Using the given values, we can calculate the standard error:

Standard Error = 20 / √14 ≈ 5.348

Substituting the values into the formula, we have:

Confidence Interval = 60 ± (2.160 * 5.348) ≈ 60 ± 11.550

Rounded to 3 decimal places, the 95% confidence interval for the population mean is approximately (48.450, 71.550).

e. It would not be reasonable to conclude that the population mean is 52 gallons because the value of 52 falls outside the 95% confidence interval. Since the confidence interval includes the range of plausible values for the population mean, any value outside the interval is less likely to be the true population mean.

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Find all solutions of the equation in the interval W([0,2 lIpi) I .In| 2 \Icos\\theta + \\sqrt {3 } = 0 \\J\n Write your answer in radians in terms of \ \(l|pi ll)\nIf there is more than one solution, separate them with commas.

Answers

The solutions in the interval [0, 2π) are θ = 150° or 5π/6 radians, 210° or 7π/6 radians.

The given equation is:

|2cosθ + √3| = 0

Since the absolute value of a real number is always non-negative, the only way for it to be equal to zero is if the quantity inside the absolute value bars is equal to zero. Therefore, we have:

2cosθ + √3 = 0

Solving for cosθ, we get:

cosθ = -√3/2

This is true for two angles in the interval [0, 2π):

θ = 5π/6, 7π/6

Since the interval given in the problem is [0, 2π), we only need to consider the solutions in this interval.

Converting the solutions to radians in terms of π, we get:

θ = 5π/6, 7π/6

Therefore, the solutions in the interval [0, 2π) are:

θ = 150° or 5π/6 radians, 210° or 7π/6 radians

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if a level .01 test is used and it is also required that b(30,500) 5 .05, what sample size n is necessary?

Answers

To determine the required sample size, we can use the formula:

n = (Zα/2 + Zβ)^2 (p1(1 - p1) + p2(1 - p2)) / (p1 - p2)^2

where:

- Zα/2 is the z-score for the desired level of significance (α/2)

- Zβ is the z-score for the desired power (1-β)

- p1 is the hypothesized proportion for the first group

- p2 is the hypothesized proportion for the second group

In this case, we want a level .01 test, which means α = 0.01 and Zα/2 = 2.58 (from a standard normal distribution table).

We also want a power of 0.95, which means β = 0.05 and Zβ = 1.645 (from a standard normal distribution table).

Since we don't have any specific values for p1 and p2, we can use the worst-case scenario where p1 = p2 = 0.5. Plugging in these values, we get:

n = (2.58 + 1.645)^2 (0.5(1 - 0.5) + 0.5(1 - 0.5)) / (0.5 - 0.5)^2

n = 784.42

Since we can't have a fractional sample size, we need to round up to the nearest integer, which gives us a required sample size of n = 785.

Therefore, we would need a sample size of at least 785 to ensure a level .01 test with a power of 0.95 for proportions of 0.5 in each group.

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A parabola has a vertex at (3,8) and passes through the point (-5,24). if we were to write the equation of the function in the form f(x) = a (x-h)^2 + k, what would the value of "a" be?

Answers

The value of "a" in the equation of the parabola in the form f(x) = [tex]a(x-h)^2 + k[/tex] can be determined by using the given information. The value of "a" for this specific parabola is 1/4.

The vertex form of a quadratic function is given by f(x) = [tex]a(x-h)^2 + k[/tex], where (h, k) represents the vertex of the parabola. In this case, the vertex is (3, 8).

Using the vertex form and substituting the given vertex coordinates, we have f(x) = a(x-3)^2 + 8.

We also know that the parabola passes through the point (-5, 24). We can substitute these coordinates into the equation to get 24 = [tex]a(-5-3)^2 + 8[/tex].

Simplifying further, we have 24 = [tex]a(-8)^2 + 8[/tex], which becomes 24 = 64a + 8.

To isolate "a," we subtract 8 from both sides: 16 = 64a.

Finally, we divide both sides by 64: 1/4 = a.

Therefore, the value of "a" in the equation of the parabola is 1/4.

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Which of the following is a solution to the inequality below?

70 ≤
10
t
− 11

Answers

Answer:

t ≥ 8.1

Step-by-step explanation:

70 ≤ 10t-11

Move the 11 to the left side of the equation, changing the sign (of the 11) to do that.

70 + 11 ≤ 10t

81 ≤ 10t

Divide both sides by 10.

8.1 ≤ t

I flip the equation so the variable is on the left: t ≥ 8.1

Since you didn't include the answer options, I'm not sure if they wanted us to solve for x and write the answer like that, or to write it like this:

t= [8.1, infinity)

Hope this helps! If it's possible though next time could you include the answer options for the problem answerers? It would help so much as we wouldn't have to do extra work and we'd know what format they want the answer to be in.

4 1/4 yard by 1 2/3 if there is a 4x4 array of these containers with no space between them what is the area covered by the containers

Answers

A 4 1/4 yard by 1 2/3 yard container, arranged in a 4x4 array with no space between them, covers an area of 68 square yards.

What is the total area covered by a 4x4 array of containers?

The total area covered by a 4x4 array of containers, each measuring 4 1/4 yard by 1 2/3 yard, without any space between them, is 68 square yards. To calculate this, we can multiply the length and width of the container to find the area of one container: 4 1/4 yards * 1 2/3 yards = 7.0833 square yards. Since there are 16 containers in the array, we multiply the area of one container by 16: 7.0833 square yards * 16 = 113.333 square yards. However, since we cannot have a fraction of a container, we round down to the nearest whole number, resulting in a total area of 68 square yards covered by the containers.

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Simplify using suitable property and mention the property:
–37 + 999 × –37

Answers

The suitable property to use is the distributive property and the simplified expression is -37000

How to use distributive property?

The suitable property to use is the distributive property. The distributive property states that the product of a number and a sum is equal to the sum of the products of the number and each of the terms in the sum.

Using the distributive property to simplify this expression states that:

a(b + c) = ab + ac

In this case:

-37 + 999 × –37 = -37(1 + 999)

Then simplify the expression as follows:

-37(1 + 999) = -37(1000) = -37000

Therefore, the simplified expression is -37000.

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A random sample of 121 checking accounts at a bank showed an average daily balance of $265. The standard deviation of the population is known to be $77. (a) Is it necessary to know anything about the shape of the distribution of the account balances in order to make an interval estimate of the mean of all the account balances? Explain O No, the mean is larger than the standard deviation so we do not need to know anything about the shape of the distribution O Yes, the sample is large and the standard deviation of the population is known so we also need to know that the shape of the distribution is at least approximately beil shaped O No, the sample is large and the standard deviation of the population is known so we do not need to know anything about the shape of the distribution. O No, the standard deviation is larger than the mean so we do not need to know anything about the shape of the distribution. Yes, the mean is larger than the standard deviation so we also need to know that the shape of the distribution is at least approximately bell shaped (b) Find the standard error of the mean (in dollars). (c) Give a point estimate of the population mean (in dollars). (d) Construct an 80% confidence interval for the population mean (in dollars). (Round your answers to the nearest cent.) $ to $. (e) Construct a 95% confidence interval for the population mean (in dollars), (Round your answers to the nearest cent) $ to $

Answers

(a) No, sample is large and the standard deviation of the population is known so we do not need to know anything about the shape of the distribution. Therefore, the correct option is C.

(b) The standard error of the mean is $7.

(c) The point estimate of the population mean is $265.

(d) The 80% confidence interval for the population mean is $254.62 to $275.38.

(e) The 95% confidence interval for the population mean is $249.94 to $280.06.

a) The correct answer to whether it is necessary to know anything about the shape of the distribution of the account balances in order to make an interval estimate of the mean of all the account balances is: No, the sample is large and the standard deviation of the population is known, so we do not need to know anything about the shape of the distribution. With a large sample size, the Central Limit Theorem allows us to assume that the sampling distribution of the mean will be approximately normal. Hence, the correct answer is option C.

(b) The formula for standard error of the mean is:

SE = σ/√n

where σ is the population standard deviation, n is the sample size, and √ is the square root. Substituting the given values, we get:

SE = 77/√121

SE = 7

(c) The point estimate of the population mean is simply the sample mean, which is given as $265.

(d) To construct an 80% confidence interval, we need to use the formula:

CI = x ± zα/2 * (σ/√n)

where x is the sample mean, zα/2 is the z-score corresponding to the desired level of confidence (in this case, 80% or 0.80), σ is the population standard deviation, and n is the sample size. From the z-table, we find that the z-score for an 80% confidence interval is 1.28. Substituting the given values, we get:

CI = $265 ± 1.28 * (77/√121)

CI = $265 ± $10.38

CI = $254.62 to $275.38

(e) To construct a 95% confidence interval, we follow the same formula but use a z-score of 1.96 (from the z-table) for the desired level of confidence. Substituting the given values, we get:

CI = $265 ± 1.96 * (77/√121)

CI = $265 ± $15.06

CI = $249.94 to $280.06

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how many steps of 2 foot 4 inches will a man take in walking 2 and 1/3 miles?

Answers

Therefore, a man will take 5280 steps of 2 foot 4 inches in walking 2 and 1/3 miles.

First, we need to convert 2 and 1/3 miles to feet.

1 mile = 5280 feet

2 and 1/3 miles = (2 * 5280) + (1/3 * 5280) = 10560 + 1760 = 12320 feet

Next, we need to convert 2 feet 4 inches to feet.

1 foot = 12 inches

2 feet 4 inches = 2 + (4/12) = 2.3333 feet (rounded to four decimal places)

Now, we can divide the total distance by the length of each step:

12320 feet ÷ 2.3333 feet = 5280 steps

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calculate the area of the shaded part in all dimensions are in cm and arcs are circular of rectangle and the shaded part which makes it oval two sides are 14​

Answers

The area of the given shaded part is 72.665 cm².

We have,

The figure is a cyclic rectangle.

Now,

Using the Pythagorean theorem,

Dimater² = 5² + 12² = 25 + 144 = 169 = 13

Diameter = 13 cm

Radius = 13/3 = 6.5 cm

The area of the circle.

= πr²

= 3.14 x 6.5 x 6.5

= 132.665 cm²

And,

The area of the rectangle.

= 5 x 12

= 60 cm²

Now,

The area of the shaded region.

= Circle's area - Rectangle's area
= 132.665 - 60

= 72.665 cm²

Thus,

The area of the given shaded part is 72.665 cm².

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find the point on the plane x 4y 5z=16 closest to the point (1,1,1).

Answers

We can use the formula for the distance from a point to a plane, which involves finding the projection of the vector from the point to the plane onto the normal vector of the plane. The closest point will be the point on the plane that is reached by adding this projection vector to the given point.

To find the point on the plane x + 4y + 5z = 16 that is closest to the point (1,1,1), we first need to find the normal vector of the plane. The coefficients of x, y, and z in the equation of the plane give us the components of the normal vector, which is (1, 4, 5).

Next, we need to find the vector from the given point (1,1,1) to the plane. This vector is given by subtracting the coordinates of any point on the plane from the coordinates of the given point. For convenience, we can choose the point (1,0,0) on the plane, which gives us the vector (0, 1, 1).

To find the projection of this vector onto the normal vector of the plane, we can use the formula for the projection of a vector u onto a vector v:

proj_v(u) = (u · v / |v|^2) * v

where · denotes the dot product and |v| denotes the length of v. Plugging in the values of u and v, we get:

proj_(1,4,5)((0,1,1)) = ((0,1,1) · (1,4,5) / |(1,4,5)|^2) * (1,4,5)

= (4/42) * (1,4,5)

= (2/21, 8/21, 10/21)

Finally, we can find the closest point on the plane by adding this projection vector to the given point (1,1,1). This gives us the point:

(1,1,1) + (2/21, 8/21, 10/21) = (23/21, 29/21, 31/21)

Therefore, the point on the plane x + 4y + 5z = 16 closest to the point (1,1,1) is (23/21, 29/21, 31/21).

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We can use the formula for the distance from a point to a plane, which involves finding the projection of the vector from the point to the plane onto the normal vector of the plane. The closest point will be the point on the plane that is reached by adding this projection vector to the given point.

To find the point on the plane x + 4y + 5z = 16 that is closest to the point (1,1,1), we first need to find the normal vector of the plane. The coefficients of x, y, and z in the equation of the plane give us the components of the normal vector, which is (1, 4, 5).

Next, we need to find the vector from the given point (1,1,1) to the plane. This vector is given by subtracting the coordinates of any point on the plane from the coordinates of the given point. For convenience, we can choose the point (1,0,0) on the plane, which gives us the vector (0, 1, 1).

To find the projection of this vector onto the normal vector of the plane, we can use the formula for the projection of a vector u onto a vector v:

proj_v(u) = (u · v / |v|^2) * v

where · denotes the dot product and |v| denotes the length of v. Plugging in the values of u and v, we get:

proj_(1,4,5)((0,1,1)) = ((0,1,1) · (1,4,5) / |(1,4,5)|^2) * (1,4,5)

= (4/42) * (1,4,5)

= (2/21, 8/21, 10/21)

Finally, we can find the closest point on the plane by adding this projection vector to the given point (1,1,1). This gives us the point:

(1,1,1) + (2/21, 8/21, 10/21) = (23/21, 29/21, 31/21)

Therefore, the point on the plane x + 4y + 5z = 16 closest to the point (1,1,1) is (23/21, 29/21, 31/21).

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find the magnitude and the direction angle for v=〈2,-2√3〉

Answers

The magnitude of the vector v=〈2,-2√3〉 is approximately 4, and the direction angle is approximately 300 degrees.

To find the magnitude and direction angle of the vector v=〈2,-2√3〉, we will follow these steps:

Step 1: Calculate the magnitude.
The magnitude of a vector v=〈a, b〉 is given by the formula ||v||=√(a²+b²). In our case, a=2 and b=-2√3.

||v|| = √(2² + (-2√3)²)
||v|| = √(4 + 12)
||v|| = √16
||v|| = 4

So, the magnitude of the vector is 4.

Step 2: Calculate the direction angle.
The direction angle (θ) of a vector v=〈a, b〉 is given by the formula θ=tan^(-1)(b/a). Here, a=2 and b=-2√3.

θ = tan^(-1)(-2√3 / 2)
θ = tan^(-1)(-√3)

Now, we find the inverse tangent of -√3. The result is approximately -60 degrees. However, since the vector is in the fourth quadrant (where both x and y are positive), we must add 360 degrees to the angle.

θ = -60 + 360
θ = 300 degrees

Therefore, the direction angle of the vector is approximately 300 degrees.

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