According to a recent survey conducted in 2016,
about 69.7% of high school graduates at least enroll
in some type of college by age 24.
Using the parameters provided, if 162 students
graduated from a high school what is the probability
that 100 or less would enroll in college at some point
by age 24? (CDF)

The value of expression is,

⇒ x ÷ 12

We have to given that;

The algebraic expression is,

⇒ x divided by 12

Hence, We can formulate;

The value of correct expression is,

⇒ x ÷ 12

⇒ x / 12

Thus, The value of expression is,

⇒ x ÷ 12

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Answer:

The kinetic energy (KE) of an object with mass (m) moving at a velocity (v) can be calculated using the formula:

KE = 1/2 * m * v^2

Substituting the given values:

KE = 1/2 * 1200 kg * (8.33 m/s)^2

KE = 41,147.5 J

Therefore, the kinetic energy of the object is 41,147.5 Joules.

Step-by-step explanation:

1.1 To find the domain of the function g(x) = √((x - 1)(2 – 2)), first, we need to determine the values of x for which the function is defined.

Since the expression inside the square root is (x - 1)(2 – 2), we can see that (2 – 2) equals zero. Therefore, the expression inside the square root simplifies to (x - 1) * 0, which is always equal to 0. The square root of 0 is also 0, so the function g(x) is defined for all real values of x. Hence, the domain of the function g(x) is all real numbers.

1.2 The size of an insect population at time t (measured in days) is given by the function p(t) = 3000 - 2000/(1+t^2). To determine the initial population (P(0)), substitute t = 0 into the function:

P(0) = 3000 - 2000/(1 + 0^2) = 3000 - 2000/1 = 3000 - 2000 = 1000

So the initial population is 1000 insects.

Next, we need to find the population size after 4 days, which means we need to evaluate p(4):

P(4) = 3000 - 2000/(1 + 4^2) = 3000 - 2000/(1 + 16) = 3000 - 2000/17 ≈ 2882.35

After 4 days, the population size is approximately 2882.35 insects.

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Means that the derivative of A at a, dA(a), is equal to L. Hence, A is differentiable at a with dA(a) = L.

To prove that the function A is differentiable at a with dA(a) = L, we need to show that:

lim(x→a) [A(x) - A(a) - L(a)(x-a)] / ||x-a|| = 0

We know that A(x) = c + L(x) for all x in RP, where c is a constant and L is a linear transformation from RP to R9.

Then, we have:

A(a) = c + L(a)

L(a)(x-a) = L(x-a) + L(a-a) = L(x-a)

Substituting these into the limit expression, we get:

lim(x→a) [c + L(x) - c - L(a) - L(x-a)] / ||x-a||

= lim(x→a) [L(x) - L(a)] / ||x-a||

Since L is a linear transformation, it is continuous. Therefore, we can write:

lim(x→a) [L(x) - L(a)] / ||x-a|| = L( lim(x→a) [x-a] / ||x-a|| )

But lim(x→a) [x-a] / ||x-a|| = u, a unit vector in the direction of x-a.

Therefore, we have:

lim(x→a) [L(x) - L(a)] / ||x-a|| = Lu

This means that the derivative of A at a, dA(a), is equal to L. Hence, A is differentiable at a with dA(a) = L.

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Answer:

v would be 28 degrees

Step-by-step explanation:

You do the total angle take away by 43.

71 - 43 = 28

The strength of the relationship is moderate, linear, and negative.

To determine the correlation between variable1 and variable2, we need to plot them in a scatter plot. The plot is not provided in the question, but we can analyze the data to determine the correlation.

Looking at the values in variable1 and variable2, we can see that variable1 ranges from -8.02429 to 8.00414 and variable2 ranges from 2.31758 to 92.44574. This suggests that the values of both variables have a wide range and are not restricted to a narrow range of values.

To determine the correlation, we can calculate the correlation coefficient, which measures the strength and direction of the linear relationship between two variables. The correlation coefficient ranges from -1 to 1, with -1 indicating a perfect negative linear relationship, 0 indicating no linear relationship, and 1 indicating a perfect positive linear relationship.

Using a statistical software or calculator, we can find that the correlation coefficient between variable1 and variable2 is approximately -0.72. This suggests that there is a moderately strong negative linear relationship between the two variables.

Therefore, the correct answer is a. The strength of the relationship is moderate, linear, and negative.

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We would need a sample size of at least 17 mice per group to detect a difference in proportions with a power of 0.8 and a significance level of 0.05.

To determine the sample size needed for a study, we can use power analysis. In this case, we want to detect a difference in proportions between two groups with a significance level of 0.05 and a power of 0.8.

We can use the following formula to calculate the sample size per group:

n = (Z_1-α/2 + Z_1-β)² × (p_1(1-p_1) + p_2(1-p_2)) / (p_1 - p_2)²

where:

Z_1-α/2 is the z-score corresponding to the chosen significance level (0.05/2 = 0.025 for a two-tailed test)

Z_1-β is the z-score corresponding to the chosen power (0.8 in this case)

p_1 is the proportion of wild type mice that develop cancer (0.25)

p_2 is the proportion of mutant mice that develop cancer (0.75)

Plugging in the values, we get:

n = (1.96 + 0.84)² × (0.25(1-0.25) + 0.75(1-0.75)) / (0.75 - 0.25)²

n = 16.48

Therefore, we would need a sample size of at least 17 mice per group to detect a difference in proportions with a power of 0.8 and a significance level of 0.05.

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We can see here that the vertices will be:

The vertex, in geometry, is the intersection of two or more lines, curves, or edges. It can also refer to the vertex of a parabola, which is where a function reaches its highest or lowest value.

We can see here that the equation of the hyperbola is seen in standard form. It is known that the center of the hyperbola is at (h, k) is (2, 1).

The distance between the center and vertices = a

where a² = coefficient of the positive term

So we see that  a² = 16

a = 4.

Also, the distance between the center and co-vertices = b

where b² = 4

b = 2.

Thus,

Vertex 1 = (2 + 4, 1) = (6, 1)

Vertex 2 = (2 - 4, 1) = (-2, 1).

Therefore, the vertices are:

(6, 1) and (-2, 1).

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if you add up 2 interior degrees the answer is the exterior degree

so the answer is 145

a) To calculate the probability that the sample proportion of defective cups from Supplier A is less than 10%, we need to find the probability that the sample proportion is less than 0.10. Thus, we need to find P(p < 0.10).

We can use the central limit theorem to approximate the distribution of the sample proportion as a normal distribution, with mean μ = 0.08 and standard deviation [tex]σ = \sqrt{0.08 (\frac{1-0.08)}{200} )}= 0.024[/tex]. Then, we can standardize the distribution and use a standard normal table or calculator to find the probability:

[tex]P (p < 0.10)=P(\frac{p-u}{σ} < \frac{0.10-0.08}{0.024} = P(z < 0.83)=0.7977[/tex]

Therefore, the probability that the sample proportion of defective cups from Supplier A is less than 10% is approximately 0.7977.

b) To calculate the probability that the sample proportion of defective cups from Supplier A is at least 5%, we need to find the probability that the sample proportion is greater than or equal to 0.05. Thus, we need to find P(p≥ 0.05).

Using the same approach as in part (a), we can find that                                                             P(p < 0.05)=-0.0207. Therefore, P(p ≥ 0.05) = 1 - P(p< 0.05) =0.9793.

Therefore, the probability that the sample proportion of defective cups from Supplier A is at least 5% is approximately 0.9793.

c) To calculate the probability that the sample proportion of defective cups from Supplier A is between 5% and 10%, we need to find the probability that 0.05 ≤ p < 0.10. We can use the same approach as in part (a) to find that P(p < 0.05) = 0.0207 and P(p < 0.10) = 0.7977. Therefore, P(0.05 ≤ p < 0.10) = P(p < 0.10) - P(p < 0.05) = 0.7770.

Therefore, the probability that the sample proportion of defective cups from Supplier A is between 5% and 10% is approximately 0.7770.

d) To calculate the probability that the sample proportion of defective cups from Supplier A is exactly 8%, we need to find P(p = 0.08). Since the sample proportion is a discrete random variable, we can use the binomial distribution to find the probability:

[tex]P(p=0.08)=(200 choose 16) (0.080)^{16} (1-0.08)^{184} = 0.1567[/tex]

Therefore, the probability that the sample proportion of defective cups from Supplier A is exactly 8% is approximately 0.1567.

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A. The domain is N and the image is the set of all natural numbers that are products of two natural numbers

B. The image is all values of y in Q such that (1 - 2x)/3 is defined.

C. we note that y² + 1 is always odd, so the image is the set of all odd natural numbers greater than or equal to 2.

What is function?

In mathematics, a function is a relationship between two sets of elements, called the domain and the range, such that each element in the domain is associated with a unique element in the range.

(a) R is a function because for each x in N, there exists a unique y in N such that xy. The domain is N and the image is the set of all natural numbers that are products of two natural numbers.

(b) R is a function because for each x in Q, there exists a unique y in Q such that 2x+3y=1. To find the domain, we solve for x in terms of y: 2x = 1 - 3y, x = (1 - 3y)/2. The domain is all values of y in Q such that (1 - 3y)/2 is defined. Simplifying, we get y ≠ 1/3. Therefore, the domain is Q - {1/3}. To find the image, we solve for y in terms of x: 3y = 1 - 2x, y = (1 - 2x)/3. The image is all values of y in Q such that (1 - 2x)/3 is defined. Therefore, the image is Q.

(c) R is a function because for each x in N, there exists a unique y in N such that y²+1=x. To find the domain, we solve for x in terms of y: y² = x - 1, y = ±√(x - 1). Since we are given that x and y are natural numbers, the domain is the set of all natural numbers greater than or equal to 2. To find the image, we note that y² + 1 is always odd, so the image is the set of all odd natural numbers greater than or equal to 2.

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The solution to the equation ex + x = 7 using Newton's method with an initial guess of Xo = 2 is approximately 1.4449.

(a) To determine the equation y = a + mx of the least square line that best fits the given data points (2,1), (1,1), (3,2), we first need to calculate the mean of x and y, and then calculate the slope m and y-intercept a of the line.

Mean of x: (2 + 1 + 3)/3 = 2

Mean of y: (1 + 1 + 2)/3 = 4/3

To calculate the slope m, we need to find the sum of (xi - x-bar)(yi - y-bar) and the sum of (xi - x-bar)^2 for each data point:

(2-2)(1-4/3) + (1-2)(1-4/3) + (3-2)(2-4/3) = -1/3

(2-2)^2 + (1-2)^2 + (3-2)^2 = 6

So, m = (-1/3) / 6 = -1/18

To calculate the y-intercept a, we can use the formula a = y-bar - m(x-bar):

a = (4/3) - (-1/18)(2) = 5/9

Therefore, the equation of the least square line is y = (5/9) - (1/18)x.

(b) We want to solve the equation ex + x = 7 using Newton's method with an initial guess of Xo = 2.

First, we need to find the derivative of the function f(x) = ex + x:

f'(x) = ex + 1

Then, we can use the formula for Newton's method:

Xn+1 = Xn - f(Xn) / f'(Xn)

Plugging in X0 = 2 and using four significant digits:

X1 = 2 - (e^2 + 2) / (e^2 + 1) = 1.574

X2 = 1.574 - (e^1.574 + 1.574) / (e^1.574 + 1) = 1.4633

X3 = 1.4633 - (e^1.4633 + 1.4633) / (e^1.4633 + 1) = 1.445

X4 = 1.445 - (e^1.445 + 1.445) / (e^1.445 + 1) = 1.4449

Therefore, the solution to the equation ex + x = 7 using Newton's method with an initial guess of Xo = 2 is approximately 1.4449.

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G. I and III only. Thus, integrals I and III necessarily have the same value, and the correct answer is G.

I. ∫[a, b] f(x)dx: This integral compute the area under the curve of f(x) from x=a to x=b.

II. ∫[a/2, b/2] f(2x)dx: This integral computes the area under the curve of f(2x) from x=a/2 to x=b/2. The function f(2x) represents a horizontal compression of the original function f(x) by a factor of 2, and the limits of integration are also halved. So, this integral doesn't necessarily have the same value as integral I.

III. ∫[a+c, b+c] f(x−c)dx: This integral computes the area under the curve of f(x−c) from x=a+c to x=b+c. The function f(x−c) represents a horizontal shift of the original function f(x) by c units, but it does not change the shape of the curve. Since the limits of integration are also shifted by c units, this integral has the same value as integral I.

Thus, integrals I and III necessarily have the same value, and the correct answer is G.

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Using the moment generating function technique, we can determine the limiting distribution of X as n approaches infinity, but the exact form of the distribution will depend on the value of t and may require additional approximation methods to evaluate.

To find the limiting distribution of the random variable X with a chi-square distribution, we can use the moment generating function (MGF) technique. The moment generating function of X is defined as M_X(t) = E(e^(tX)).

For a chi-square distribution with n degrees of freedom, the probability density function (pdf) is given by:

f(x) = (1/(2^(n/2) * Γ(n/2))) * x^((n/2)-1) * e^(-x/2)

To find the moment generating function, we evaluate the integral:

M_X(t) = ∫[0 to ∞] e^(tx) * f(x) dx

Substituting the pdf into the MGF expression, we have:

M_X(t) = ∫[0 to ∞] e^(tx) * (1/(2^(n/2) * Γ(n/2))) * x^((n/2)-1) * e^(-x/2) dx

Simplifying, we get:

M_X(t) = (1/(2^(n/2) * Γ(n/2))) * ∫[0 to ∞] x^((n/2)-1) * e^((t-1/2)x) dx

To find the limiting distribution, we take the limit of the MGF as n approaches infinity. Using the property of the gamma function, we have:

lim(n->∞) (1/(2^(n/2) * Γ(n/2))) = 1

So, the limiting moment generating function becomes:

lim(n->∞) M_X(t) = ∫[0 to ∞] x^((n/2)-1) * e^((t-1/2)x) dx

To evaluate this integral, we need to use techniques such as Laplace's method or the saddlepoint approximation. The exact form of the limiting distribution depends on the specific value of t and may not have a closed-form expression.

Therefore, using the moment generating function technique, we can determine the limiting distribution of X as n approaches infinity, but the exact form of the distribution will depend on the value of t and may require additional approximation methods to evaluate.

The result obtained for the limiting distribution of the random variable X with a chi-square distribution as n approaches infinity has practical implications in various areas. Here are a few examples:

Approximation of chi-square distributions: The limiting distribution can be used as an approximation for chi-square distributions with large degrees of freedom. When the degrees of freedom are sufficiently large, the limiting distribution can provide a good approximation to the chi-square distribution. This can be useful in statistical analysis and hypothesis testing, where chi-square distributions are commonly used.

Central Limit Theorem: The result is related to the Central Limit Theorem, which states that the sum or average of a large number of independent and identically distributed random variables tends to follow a normal distribution. Since the chi-square distribution arises in various statistical contexts, the limiting distribution can help in approximating the distribution of sums or averages involving chi-square random variables.

Statistical inference: The limiting distribution can have implications for statistical inference procedures. For example, in hypothesis testing or confidence interval estimation involving chi-square statistics, knowledge of the limiting distribution can aid in determining critical values or constructing confidence intervals. It can also be used to assess the asymptotic properties of estimators based on chi-square distributions.

Simulation studies: The limiting distribution can be used in simulation studies to generate random samples that mimic chi-square distributions with large degrees of freedom. This can be helpful in situations where directly simulating from the chi-square distribution is computationally expensive or difficult.

Overall, understanding the limiting distribution of the chi-square distribution as n approaches infinity provides insights into the behavior of chi-square random variables and can be used as a practical tool in various statistical applications, such as approximation, inference, and simulation studies.

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If the corners of the kitchen are (8, 4), (−3, 4), (8, −8), and (−3, −8), the area of the kitchen is 132 square feet. So, the correct option is C.

To find the area of the rectangular kitchen, we need to use the formula for the area of a rectangle, which is A = L x W, where A is the area, L is the length, and W is the width.

From the given ordered pairs, we can determine the length and width of the rectangle. The length is the distance between the points (8,4) and (-3,4), which is 8 - (-3) = 11 feet. The width is the distance between the points (8,4) and (8,-8), which is 4 - (-8) = 12 feet.

Now that we know the length and width, we can find the area by multiplying them together:

A = L x W = 11 x 12 = 132 square feet

Therefore, the correct answer is C.

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Answer    C. 132 fT2  

Step-by-step explanation:

The predicted number of guests at the festival in 2022 is 1846.15, rounded to two decimal places.

To calculate the 2-year Weighted Moving Average (WMA) to predict the number of guests at the festival in 2022, you will need to follow these steps:

1. First, you need to calculate the weighted average for the most recent two years. To do this, you multiply the number of guests in 2021 (2968) by the first weight (0.7), and you multiply the number of guests in 2020 (1657) by the second weight (0.3). Then you add the two products together to get the weighted average for 2020-2021:

Weighted Average = (2968 x 0.7) + (1657 x 0.3) = 2077.9

2. Next, you need to calculate the weighted average for the previous two years. To do this, you multiply the number of guests in 2019 (1559) by the first weight (0.7), and you multiply the number of guests in 2018 (1771) by the second weight (0.3). Then you add the two products together to get the weighted average for 2018-2019:

Weighted Average = (1559 x 0.7) + (1771 x 0.3) = 1614.4

3. Finally, you take the average of the two weighted averages calculated in steps 1 and 2 to get the 2-year Weighted Moving Average for 2022:

2-year WMA for 2022 = (2077.9 + 1614.4) / 2 = 1846.15

Therefore, the predicted number of guests at the festival in 2022 is 1846.15, rounded to two decimal places.

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We can expect about 84 watermelons to weigh less than 17.36 pounds.

We have,

To answer this question, we need to use the concept of standard normal distribution.

First, we need to calculate the z-score of 17.36 using the formula:
z = (x - μ) / σ
where x is the weight we're interested in, μ is the mean weight, and σ is the standard deviation. Substituting the values given in the question, we get:
z = (17.36 - 20) / 2.9
z = -0.9655

Now, we can look up the area under the standard normal curve to the left of z = -0.9655 using a z-table or a calculator. The result is 0.1675.

This means that about 16.75% of the watermelons will weigh less than 17.36 pounds.

To find the actual number of watermelons, we can multiply this percentage by the total number of watermelons produced:
500 x 0.1675 = 83.75

Therefore,

We can expect about 84 watermelons to weigh less than 17.36 pounds.

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Consider the given terms to find the form of the particular solution for the given differential equation y'' + 4y = e^(2x).

The given differential equation is a nonhomogeneous linear second-order differential equation, and we need to find a particular solution (yp) to form the general solution. The right-hand side of the equation is e^(2x), so we will try to find a particular solution using the given terms that include exponential functions.

The form of the particular solution for the given DE y'' + 4y = e^(2x) is (d) yp = Axe^(2x). The other choices don't satisfy the given differential equation when taking their first and second derivatives and plugging them back into the equation.

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Answer:

Step-by-step explanation:

the expected cost of repairing defective components with the guarantee ($1410) is lower than the expected cost of repairing defective components without the guarantee ($2400), it is worthwhile for the purchasing agent to purchase the supplier's guarantee policy.

To determine whether it is worthwhile to purchase the supplier's guarantee policy, we need to compare the expected cost of repairing defective components without the guarantee to the expected cost of purchasing the guarantee and repairing any additional defective components.

Without the guarantee, the expected cost of repairing defective components is given by the expected value of the cost per lot of replacing faulty items, which is:

E[repair cost without guarantee] = $20 * E[number of defective components per lot]

From the probability distribution given in the file p09 55.xlsx, we can calculate that the expected number of defective components per lot is:

E[number of defective components per lot] = 0.1 * 1000 + 0.05 * 1000 + 0.03 * 1000 + 0.02 * 1000 + 0.005 * 1000 = 120

Therefore, the expected cost of repairing defective components without the guarantee is:

E[repair cost without guarantee] = $20 * E[number of defective components per lot] = $20 * 120 = $2400

With the guarantee, the expected cost of repairing defective components is the sum of the cost of the guarantee and the expected cost of repairing any additional defective components beyond the first 100. The probability of having more than 100 defective components per lot is:

P[number of defective components per lot > 100] = P[number of defective components per lot = 120] + P[number of defective components per lot = 150] + P[number of defective components per lot = 170] + P[number of defective components per lot = 180] + P[number of defective components per lot = 205] = 0.1 + 0.05 + 0.03 + 0.02 + 0.005 = 0.205

Therefore, the expected cost of repairing defective components with the guarantee is:

E[repair cost with guarantee] = $1000 + $20 * (E[number of defective components per lot] - 100) * P[number of defective components per lot > 100]
                                = $1000 + $20 * (120 - 100) * 0.205
                                = $1000 + $410 = $1410

Since the expected cost of repairing defective components with the guarantee ($1410) is lower than the expected cost of repairing defective components without the guarantee ($2400), it is worthwhile for the purchasing agent to purchase the supplier's guarantee policy.

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The conditions that must hold for inferential procedures to be valid for this scenario are:

(b) the two sample groups must be independent of each other, (c) the data distribution for both men's and women's hemoglobin levels must be normally distributed or each sample size must be larger than 30, and (d) the observations within each sample must be independent.

(b) The two sample groups must be independent of each other because the samples should not be related in any way that could influence the results.

(c) The data distribution for both men's and women's hemoglobin levels must be normally distributed or each sample size must be larger than 30. If the data is not normally distributed, then the Central Limit Theorem can be applied if the sample size is greater than 30.

(d) The observations within each sample must be independent to avoid bias in the results. This means that each observation should not be influenced by any other observation.

(a) The expected count for each level of the categorical variable must be at least 5. This condition is relevant for Chi-square tests of independence, which are not being used in this scenario.

(e) There must be 10 successes and 10 failures in each sample. This condition is relevant for tests of proportions, which are not being used in this scenario.

So b,c and d are correct options.

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Answer:

PART 1: K 5375.66

PART 2: 38.1051177665 or 38  210235533/2000000000

Step-by-step explanation:

1. (i) Compounded Semi Annually: A = P × [1 + r/n]nt A = K4,000 × [1 + 6%/2]2×5 A = K4,000 × [1 + 0.03]10 A = K4,000 × [1.03]10 A = K4,000 × [1.344] A = K 5375.66

2. √(243) + (3√ (75) - √(12)= 38.1051177665

38.1051177665 as a decimal: 38.1051177665

38.1051177665 as a a fraction: 38  210235533/2000000000

K5376.48 will be in the account after 5 years compounded semi-annually. K5396.32 will be in the account after 5 years compounded weekly. The value of simplification is  22√3.

Compounded semi-annually

The interest rate per period is r = 6% / 2 = 0.03

The number of periods is n = 5 x 2 = 10

The amount A after n periods is given by

A = K(1 + r)ⁿ

A = 4000(1 + 0.03)¹⁰

A = 4000 x 1.34412

A = K5376.48

Compounded weekly

The interest rate per period is r = 6% / 52 = 0.001153846

The number of periods is n = 5 x 52 = 260

The amount A after n periods is given by

A = K(1 + r)ⁿ

A = 4000(1 + 0.001153846)²⁶⁰

A = 4000 x 1.34908

A = K5396.32

√243 + 3√75 - √12

= √(81 x 3) + 3√(25 x 3) - √(4 x 3)

= 9√3 + 15√3 - 2√3

= 22√3

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The actual length and width of the kitchen in the scale drawing is: 22.5 ft x 17.5 ft

A scale drawing is defined as an enlargement of an object. An enlargement changes the size of an object by multiplying each of the lengths by a scale factor to make it larger or smaller. The scale of a drawing is usually stated as a ratio.

Now, the scale factor of the given drawing is seen as 2 in : 5 ft

From the drawing the dimensions of the kitchen are:

9" x 7"

Thus:

True length = (9 * 5)/2 = 22.5 ft

True width = (7 * 5)/2 = 17.5 ft

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Answer:

41

Step-by-step explanation:

All the values are as follows

27 28 31 38 41 43 50 52 56

If we go to the middle value (9 total values so #5), it's 41.

To find the coordinate vector of P relative to the basis S = {P1, P2, P3}, we need to express P as a linear combination of the basis vectors P1, P2, and P3. Given P = 3 - 4x + 2x^2, P1 = 1, P2 = x, and P3 = x^3, we want to find constants a, b, and c such that:

P = a * P1 + b * P2 + c * P3

3 - 4x + 2x^2 = a(1) + b(x) + c(x^3)

Now, we can compare the coefficients of the powers of x on both sides of the equation:

For x^0: 3 = a
For x^1: -4 = b
For x^2: 2 = 0a + 0b + 0c (since there's no x^2 term in P1, P2, or P3)
For x^3: 0 = 0a + 0b + c (since there's no x^3 term in P)

From these equations, we get a = 3, b = -4, and c = 0.

Thus, the coordinate vector of P relative to the basis S = {P1, P2, P3} is (a, b, c) = (3, -4, 0).

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If a candy bar cost 95 cents, then I'll cost 3.8$ to buy the four candy's

To Find How much will it cost to buy 4 candy bars which comes in price of 95 cents per candy bar so therefore calculation will be:

One candy bar cost  = 95 cent

We will use multiplication to multiply the cost of each candy.

4 candy bar costs  = 4 x  price of one candy

4 candy bar costs  = 4 x  95 cents

4 candy bar costs  = 380 cents

After that we get:

100 cents = 1 $

Now we will divide:

4 candy bar costs  = 380/100$

4 candy bar costs  = 3.8 $

Therefore, If a candy bar is 95 cents, it will cost me 3.8$ to purchase the four candies together.

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a. The probability that exactly two adults say they are more likely to make purchases during a sales tax holiday is 0.275.

b.  The probability that more than two adults say they are more likely to make purchases during a sales tax holiday is .305

c. The probability that between two and five adults say they are more likely to make purchases during a sales tax holiday, inclusive, is  0.736.

This is a binomial distribution problem with n = 10 and p = 0.28.

(a) The probability that exactly two adults say they are more likely to make purchases during a sales tax holiday is:

P(2) = (10 choose 2) * 0.28^2 * 0.72^8 = 0.275

Therefore, P(2) ≈ 0.275.

(b) The probability that more than two adults say they are more likely to make purchases during a sales tax holiday is:

P(x > 2) = 1 - P(x ≤ 2) = 1 - [P(0) + P(1) + P(2)]

= 1 - [(10 choose 0) * 0.28^0 * 0.72^10 + (10 choose 1) * 0.28^1 * 0.72^9 + (10 choose 2) * 0.28^2 * 0.72^8]

= 1 - (0.125 + 0.295 + 0.275)

≈ 0.305

Therefore, P(x > 2) ≈ 0.305.

(c) The probability that between two and five adults say they are more likely to make purchases during a sales tax holiday, inclusive, is:

P(2≤x≤5) = P(2) + P(3) + P(4) + P(5)

= (10 choose 2) * 0.28^2 * 0.72^8 + (10 choose 3) * 0.28^3 * 0.72^7 + (10 choose 4) * 0.28^4 * 0.72^6 + (10 choose 5) * 0.28^5 * 0.72^5

≈ 0.736

Therefore, P(2≤x≤5) ≈ 0.736.

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Roots of a quadratic equation using the factorisation method, we need to find two numbers that multiply to the constant term of the equation and add up to the coefficient of the linear term. Then, we can use these two numbers to factor the quadratic expression and solve for the roots.

a) For the quadratic equation x^2 - 10x + 16 = 0, we need to find two numbers that multiply to 16 and add up to -10. These numbers are -2 and -8, so we can write the quadratic as (x - 2)(x - 8) = 0. Setting each factor equal to zero, we get x - 2 = 0 and x - 8 = 0, which give us the roots x = 2 and x = 8.

b) For the quadratic equation 2x^2 + 3x - 9 = 0, we need to find two numbers that multiply to -18 (since 2*(-9) = -18) and add up to 3. These numbers are 6 and -3, so we can write the quadratic as 2x^2 + 6x - 9x - 9 = 0. Factoring by grouping, we get 2x(x + 3) - 9(x + 3) = 0, which simplifies to (2x - 9)(x + 3) = 0. Setting each factor equal to zero, we get 2x - 9 = 0 and x + 3 = 0, which give us the roots x = 9/2 and x = -3.

c) For the quadratic equation x^2 - 5x = 0, we can factor out an x to get x(x - 5) = 0. Setting each factor equal to zero, we get x = 0 and x - 5 = 0, which give us the roots x = 0 and x = 5.

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