Dishwashers are on sale for 25% off the original price (d), which can be expressed with the function p(d) = 0. 75d. Local taxes are an additional 14% of the discounted price, which can be expressed with the function c(p) = 1. 14p. Using this information, which of the following represents the final price of a dishwasher, with the discount and taxes applied? c[p(d)] = 1. 89p d[c(p)] = 0. 8555d c[p(d)] = 0. 855d d[c(p)] = 1. 89p.

The number of child tickets sold is 56, and the number of adult tickets sold is 24.

Let's assume the number of child tickets sold is represented by 'x', and the number of adult tickets sold is represented by 'y'.

According to the given information, the total number of tickets sold is 80. Therefore, we have the equation:

x + y = 80 ---(1)

The total revenue generated from ticket sales is $734.00. Since each child ticket costs $5.50 and each adult ticket costs $11.50, we can express the total revenue as:

5.50x + 11.50y = 734.00 ---(2)

To solve this system of equations, we can use the substitution method or the elimination method. Let's use the elimination method:

Multiply equation (1) by 5.50 to eliminate 'x':

5.50(x + y) = 5.50(80)

5.50x + 5.50y = 440 ---(3)

Subtract equation (3) from equation (2) to eliminate 'x':

(5.50x + 11.50y) - (5.50x + 5.50y) = 734.00 - 440

6.00y = 294

y = 49

Substitute the value of y back into equation (1) to find x:

x + 49 = 80

x = 80 - 49

x = 31

Therefore, the number of child tickets sold is 31, and the number of adult tickets sold is 49, which adds up to a total of 80 tickets, as stated in the problem.

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The series is absolutely convergent. The series Σ(1/n^9) converges (as a p-series with p = 9 > 1), by the limit comparison test also converges absolutely.

We can use the limit comparison test to determine the convergence of the series:

Since arctan(n) ≤ π/2 for all n ≥ 1, we have |(-1)^n arctan(n) / n^9| ≤ π/2n^9 for all n ≥ 1.

Since the series Σ(1/n^9) converges (as a p-series with p = 9 > 1), by the limit comparison test, the given series also converges absolutely.

Therefore, the series is absolutely convergent.

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When the discriminant equals zero, the equation is quadratic because a quadratic equation with a discriminant of zero only has one real root, which is a repeated root.

What is a discriminant?The discriminant of a quadratic equation is b²-4ac. It can be used to determine the nature of the roots of a quadratic equation. If the discriminant is greater than zero, the quadratic has two real roots. If the discriminant is less than zero, the quadratic has two complex roots. If the discriminant is equal to zero, the quadratic has one real root that is repeated.What is a quadratic equation?A quadratic equation is an equation in which the highest power of the variable is 2. The standard form of a quadratic equation is ax²+bx+c=0, where a, b, and c are real numbers, and x is the variable. Quadratic equations can be solved using a variety of methods, including factoring, completing the square, and using the quadratic formula.The quadratic formula is x= (-b±√b²-4ac)/2a. This formula is used to find the roots of a quadratic equation. If the discriminant is zero, the formula becomes x=-b/2a, which is used to find the repeated root of the quadratic equation.Therefore, when the discriminant equals zero, the equation is a quadratic because it has one real root that is repeated.

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The rate at which the tree will grow in just 1 year would be = 3ft/year.

The quantity of tree that grows in 1/12 year = 1/4 ft

The quantity of tree that will grow in 1 year = X ft.

That is;

1/12 years = 1/4ft

1 year = X

Make X the subject of formula;

X= 1/4÷1/12

X = 1/4×12/1

X = 3 ft

Therefore, the rate at which the tree will grow in just 1 year would be = 3 ft/year.

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To find a second-degree polynomial satisfying the given conditions, we can start with a general form of a second-degree polynomial:

p(x) = ax^2 + bx + c

Given that p(1) = 2, p'(1) = 2, and p''(1) = 4, we can substitute these values into the polynomial and its derivatives to form a system of equations.

p(1) = 2:

a(1)^2 + b(1) + c = 2

a + b + c = 2

p'(1) = 2:

2a(1) + b = 2

2a + b = 2

p''(1) = 4:

2a = 4

a = 2

From equation 3, we find that a = 2. Substituting this value into equation 2, we can solve for b:

2(2) + b = 2

4 + b = 2

b = -2

Finally, substituting the values of a and b into equation 1, we can solve for c:

2 + (-2) + c = 2

c = 2

Therefore, the second-degree polynomial satisfying the given conditions is:

p(x) = 2x^2 - 2x + 2

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The length of the arc AB is approximately 66.5 cm. We can use the formula given below to find the length of the arc:arc length = (central angle / 360°) x (2πr), where r is the radius of the circle. Here, we are given the radius of the circle as 5 7.9 cm and the central angle as 360°.

Thus, the formula becomes: arc length = (360° / 360°) x (2 x 3.14 x 5 7.9) arc length = 2 x 3.14 x 57.9 arc length = 364.452 cm ≈ 364.5 cm However, the answer needs to be rounded to the nearest tenth. Since the tenths place is occupied by 4, we need to round up the hundredths place, which is 5. Thus, the final answer is: arc length AB = 66.5 cm (rounded to the nearest tenth).Therefore, the length of arc AB is approximately 66.5 cm.

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The length of arc AB is 5.5 cm when rounded to the nearest tenth.

To find the length of arc AB, the radius and the angle at the center are required since they are the main parameters for calculating the length of arc AB.

Since the radius has not been given, it can be computed as shown below.

r = 2πr / 360°

= 7 x 3.14 / 360°

= 0.061 cm/degree

The angle at the center of AB is 180°/2 = 90°.

Therefore, the length of arc AB is given by

L = rθ

= 0.061 cm/degree x 90°

= 5.49 cm

Hence, the length of arc AB is 5.5 cm when rounded to the nearest tenth.

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The vertex, focus, and directrix of the parabola x^2 = 2y are Vertex: (0, 0), Focus: (0, 1/2), Directrix: y = -1/2

The given equation is x^2 = 2y, which is a parabola with vertex at the origin.

The general form of a parabola is y^2 = 4ax, where a is the distance from the vertex to the focus and to the directrix.

Comparing the given equation x^2 = 2y with the general form, we get 4a = 2, which gives us a = 1/2.

Hence, the focus is at (0, a) = (0, 1/2), and the directrix is the horizontal line y = -a = -1/2.

Therefore, the vertex, focus, and directrix of the parabola x^2 = 2y are:

Vertex: (0, 0)

Focus: (0, 1/2)

Directrix: y = -1/2

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i) Degrees of freedom are there for the critical value will be 15.

ii) The critical value will be 2.131.

iii) The margin of error will be 1.004

iv) The 95% confidence interval that can be constructed will be between 0.078 and 2.698.

i) The degrees of freedom for the critical value is n-2 = 17-2 = 15.

ii) The critical value can be found using a t-distribution table with 15 degrees of freedom and a confidence level of 95%. The critical value is 2.131.

iii) The margin of error can be calculated using the formula:

ME = t_(alpha/2) * SE_b1

where t_(alpha/2) is the critical value, and SE_b1 is the standard error of the slope coefficient.

ME = [tex]2.131 \times 2.080 / \sqrt{(16.106)}[/tex] = 1.004

iv) The 95% confidence interval can be constructed using the formula:

CI = b1 +/- t_(alpha/2) [tex]\times[/tex]SE_b1

CI = [tex]1.388 +/- 2.131 \times 2.080 / \sqrt{(16.106)}[/tex] = (0.078, 2.698)

Therefore, we can be 95% confident that the true slope coefficient beta_1 falls between 0.078 and 2.698.

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Answer:

Draw diagonal AC.

Set your calculator to degree mode.

Use the Law of Cosines to find AC.

AC = √(6^2 + 8^2 -2(6)(8)(cos 95°))

= 10.41

From this, use the Pythagorean Theorem to find DC.

DC = √(10.41^2 - 5^2) = 9.13

So the perimeter of ABCD is

5 + 6 + 8 + 9.13 = 28.13 cm

The critical angle for light traveling from plastic to air is approximately 42.16 degrees.

The critical angle is the angle of incidence at which the refracted angle of light is 90 degrees, i.e., the angle of refraction is 90 degrees, and the refracted ray travels parallel to the interface between two media.

The critical angle can be calculated using Snell's Law, which relates the angles of incidence and refraction to the indices of refraction of the two media:

n1 * sin(theta1) = n2 * sin(theta2)

where n1 and n2 are the indices of refraction of the first and second media, respectively, and theta1 and theta2 are the angles of incidence and refraction, respectively.

When the angle of incidence is equal to or greater than the critical angle, there is no refracted ray, and all of the light is reflected internally.

To find the critical angle in this case, we can set the angle of refraction to 90 degrees:

n1 * sin(theta1) = n2 * sin(90)

n1 * sin(theta1) = n2

Substituting the values given:

1.50 * sin(theta1) = 1.00

sin(theta1) = 1.00 / 1.50

sin(theta1) = 0.6667

We can use the inverse sine function[tex](sin^-1)[/tex]to find the angle:

[tex]theta1 = sin^-1(0.6667)[/tex]

theta1 = 42.16 degrees

Therefore, the critical angle for light traveling from plastic to air is approximately 42.16 degrees.

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The critical angle is the angle of incidence at which the refracted angle of light is 90 degrees, causing the light to reflect back into the medium it originated from.

To calculate the critical angle, we use Snell's law, which states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the refractive indices of the two media.
In this case, the refractive index of plastic is 1.50, and the refractive index of air is 1.00. We want to find the critical angle when light travels from plastic to air. We can set the angle of refraction to 90 degrees, and solve for the angle of incidence.

Snell's Law states that n1 * sin(theta1) = n2 * sin(theta2), where theta1 is the angle of incidence and theta2 is the angle of refraction. At the critical angle, the refracted light will travel parallel to the boundary, meaning that theta2 = 90 degrees.

So, we can modify Snell's Law for this specific case: n1 * sin(theta1) = n2 * sin(90). Since sin(90) = 1, the equation becomes n1 * sin(theta1) = n2.

Now we can solve for theta1:

sin(theta1) = n2 / n1
sin(theta1) = 1.00 / 1.50
sin(theta1) = 0.6667

Now, to find the critical angle, theta1, take the inverse sine (arcsin) of 0.6667:

theta1 = arcsin(0.6667)
theta1 ≈ 41.8 degrees
Therefore, the critical angle for light traveling from plastic to air is 41.8 degrees. If the angle of incidence is greater than 41.8 degrees, the light will be reflected back into the plastic. If the angle of incidence is less than 41.8 degrees, the light will be refracted out of the plastic and into the air.
So, the critical angle, theta1, for light traveling from plastic to air is approximately 41.8 degrees.

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Rounded to the nearest whole number, the container is approximately 52% full.

To find the percentage that the shipping container is full, we need to compare the volume of the shipped goods to the total volume of the container.

Given dimensions:

Length = 35 ft

Width = 8 ft

Height = 9 ft 9 in

We need to convert the height to feet by dividing the inches by 12:

Height = 9 ft + (9/12) ft = 9.75 ft

Total volume of the container:

Volume = Length × Width × Height

Volume = 35 ft × 8 ft × 9.75 ft

Volume = 2730 ft³

Volume of the shipped goods:

Given as 1420 ft³

To find the percentage filled, we divide the volume of the shipped goods by the total volume of the container and multiply by 100:

Percentage filled = (Volume of shipped goods / Total volume of container) × 100

Percentage filled = (1420 ft³ / 2730 ft³) × 100

Percentage filled ≈ 52.0%

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a. t = 2.58, N = 21, two-tailed test at α = 0.05:

To determine whether to reject or fail to reject the null hypothesis, we need to compare the calculated t-value to the critical t-value from a t-distribution with N - 1 degrees of freedom at the given alpha level.

For a two-tailed test at α = 0.05 with 21 degrees of freedom, the critical t-value is approximately ±2.080.

Since the calculated t-value of 2.58 is greater than the critical value of 2.080, we would reject the null hypothesis.

b. t = 1.99, N = 49, one-tailed test at α = 0.01:

For a one-tailed test, the critical value is based on the tail of the distribution where the alternative hypothesis is located.

At α = 0.01 and 49 degrees of freedom, the critical value for a one-tailed test is approximately 2.404.

Since the calculated t-value of 1.99 is less than the critical value of 2.404, we would fail to reject the null hypothesis.

c. μ = 47.82, 99% CI = (48.71, 49.28):

The confidence interval (CI) gives us a range of values that the population mean is likely to be within. In this case, we have a 99% CI, which means that there is a 99% chance that the true population mean falls between 48.71 and 49.28.

Since the null hypothesis typically states that the population mean equals a certain value, in this case, 47.82, we can conclude that we would reject the null hypothesis.

d. μ = 0, 95% CI = (-0.15, 0.20):

The confidence interval in this case gives us a range of values that the population mean is likely to be within. Since the null hypothesis typically states that the population mean equals a certain value, in this case, 0, we can conclude that we would fail to reject the null hypothesis, since the interval includes 0.

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a) To find t0.005 when v = 6, we need to look up the value in a t-distribution table with a two-tailed area of 0.005 and 6 degrees of freedom. From the table, we find that t0.005 = -3.707.

b) To find t0.025 when v = 11, we need to look up the value in a t-distribution table with a two-tailed area of 0.025 and 11 degrees of freedom. From the table, we find that t0.025 = -2.201.

c) To find t0.99 when v = 18, we need to look up the value with a one-tailed area of 0.99 and 18 degrees of freedom. From the table, we find that t0.99 = 2.878. Note that we only look up one-tailed area since we are interested in the value in the upper tail of the distribution.

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Answer:

72

Step-by-step explanation:

(2^3)=8

(3^2)=9

8*9=72

Answer: A number line is a line in which numbers are marked at an equal distance from each other, either horizontally or vertically. The numbers on the right side of the line are positive numbers. Positive numbers are numbers that are greater than zero. Positive numbers include both whole numbers and decimals greater than zero.

A number line is an effective tool for visualizing and ordering positive numbers. On a number line, positive numbers are represented to the right of zero, and they increase in value as you move farther to the right. For instance, the number 2 is to the right of the number 1, and the number 10 is farther to the right than the number 2. Similarly, 3.5 is a larger number than 2.5. Hence, the answer is: Draw a number line and mark all positive numbers on it.

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In deciding whether to insert company-designed danger symbols to denote the potential for electrocution, the writer's primary concern should be liability law.

This will be the correct option.

Why liability law is a writer's primary concern? Liability law or legal accountability is important for companies, and individuals may be held accountable for their activities.

These rules exist to shield consumers from businesses that are not up to par.

An individual's freedom to speak their thoughts is limited to prevent harm to others.

The symbol used for electrocution danger should be placed in the manual by the writer.

Electricians or people working in electrical fields require the warning symbol to be included in the manual to avoid accidents and keep them safe.

When writing a manual, the writer should be concerned about liability law, which ensures that the company is not held accountable if an accident occurs as a result of insufficient warning or instruction in the manual.

The writer's job in writing a manual is to provide instruction to the readers, which is why they must ensure that everything is done legally and safely so that they do not fall under liability law.

Therefore, the writer's primary concern should be liability law when considering whether to insert company-designed danger symbols to denote the potential for electrocution.

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Leon's grade on the fifth test is 89. Based on his previous test scores and his desired average of 87.6, he needs to score an 89 on the fifth test to maintain that average.

To use the formula x‾=x1 x2 … xnn to find Leon's grade on the fifth test, we first need to find the sum of his first four test grades.

Sum of first four test grades = 95 + 83 + 92 + 79 = 349

Next, we can use the formula to find Leon's grade on the fifth test:

x‾ = (x1 + x2 + x3 + x4 + x5) / 5

We know that Leon's average test grade is 87.6, so we can substitute in the values we have:

87.6 = (349 + x5) / 5

Multiplying both sides by 5, we get:

438 = 349 + x5

Subtracting 349 from both sides, we get:

x5 = 89

Therefore, Leon's grade on the fifth test is 89.

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The surface area of the cylindrical vase is approximately: 178.2 square inches.

To find the surface area of the cylindrical vase, we need to calculate the area of the curved surface (lateral area) and the area of the two bases.

Given:

Diameter = 4.3 inches

Radius = Diameter / 2 = 4.3 inches / 2 = 2.15 inches

Height = 11 inches

The lateral area of a cylinder is given by the formula: Lateral Area = 2πrh, where r is the radius and h is the height.

Lateral Area = 2 * 3.14159 * 2.15 inches * 11 inches = 149.17934 square inches

The area of a circle (base) is given by the formula: Base Area = πr^2.

Base Area = 3.14159 * (2.15 inches)^2 = 14.52222 square inches

The total surface area is the sum of the lateral area and the two base areas.

Surface Area = Lateral Area + 2 * Base Area

= 149.17934 square inches + 2 * 14.52222 square inches

≈ 178.2 square inches

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Answer:

x^2 - 8x + 9 + -2/(X +10)

Step-by-step explanation:

1) divide x^3 by x to get x^2

2) multiply x +10 by x^2 to get x^3 + 10x^2

3) subtract x^3 + 10x^2 from x^3 + 2x^2 to get -8x^2

4) divide -8x^2 by x to get -8x

5) multiply -8x by x +10 to get -8x^2 - 80x

6) subtract -8x^2 - 80x from -8x^2 - 71x to get 9x

7) divide 9x by x to get 9

8) multiply 9 by x + 10 to get 9x + 90

9) subtract 9x + 90 from 9x + 88 to get -2.

The conclusion that can be drawn from the box plots is that the attendance on Friday has a greater interquartile range than attendance on Saturday, but both data sets have the same median.

What is interquartile range?

Interquartile range (IQR) is a measure of variability, based on splitting a data set into quartiles. It is equal to the difference between the third quartile and the first quartile. An IQR can be used as a measure of how far the spread of the data goes.A box plot, also known as a box-and-whisker plot, is a type of graph that displays the distribution of a group of data. Each box plot represents a data set's quartiles, median, minimum, and maximum values. This is a visual representation of numerical data that can be used to identify patterns and outliers.

What is Median?

The median is a statistic that represents the middle value of a data set when it is sorted in order. When the data set has an odd number of observations, the median is the middle value. When the data set has an even number of observations, the median is the average of the two middle values.

In other words, the median is the value that splits a data set in half.

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The set of all triples of real numbers with the standard vector addition but with scalar multiplication defined by k(x, y, z) = (k²x, k²y, k²

What are the real numbers?

Real numbers are a set of numbers that includes all the rational and irrational numbers. The set of real numbers is denoted by the symbol R.

We need to check if the set of all triples of real numbers with the standard vector addition, denoted by (V, +), and scalar multiplication defined by k(x, y, z) = (k²x, k²y, k²z), denoted by (V, ·), is a vector space.

First, we need to check the vector space axioms:

Closure under addition: For any vectors u = (u1, u2, u3) and v = (v1, v2, v3) in V, their sum u + v = (u1 + v1, u2+v2, u3+v3) is also in V. This is true since the standard vector addition is used.

Commutativity of addition: For any vectors u, v in V, u + v = v + u. This is true since the standard vector addition is commutative.

Associativity of addition: For any vectors u, v, w in V, u + (v + w) = (u + v) + w. This is true since the standard vector addition is associative.

Identity element of addition: There exists a vector 0 in V, called the zero vector, such that for any vector u in V, u + 0 = u. The zero vector is (0, 0, 0), and this axiom holds.

Inverse elements of addition: For any vector u in V, there exists a vector -u in V, called the additive inverse of u, such that u + (-u) = 0. This is true since the standard vector addition is used.

Closure under scalar multiplication: For any vector u in V and any scalar k, k · u = (k²u1, k²u2, k²u3) is also in V. This is true since scalar multiplication is defined as k(x, y, z) = (k²x, k²y, k²z).

Distributivity of scalar multiplication over vector addition: For any vectors u, v in V and any scalar k, k · (u + v) = k · u + k · v. This is true since scalar multiplication is defined using the standard scalar multiplication of the real numbers.

Distributivity of scalar multiplication over scalar addition: For any vector u in V and any scalars k, l, (k + l) · u = k · u + l · u.

This is true since scalar multiplication is defined using the standard scalar multiplication of the real numbers.

Associativity of scalar multiplication: For any vector u in V and any scalars k, l, (kl) · u = k · (l · u).

This is true since scalar multiplication is defined using the standard scalar multiplication of the real numbers.

The identity element of scalar multiplication:

For any vector u in V, 1 · u = u, where 1 is the multiplicative identity of the real numbers.

This is not true in this case, since 1 · (x, y, z) = (x, y, z), whereas the scalar multiplication defined in this problem is k(x, y, z) = (k²x, k²y, k²z).

Thus, the set of all triples of real numbers with the given operations is not a vector space, since it violates the identity element of scalar multiplication axiom.

Therefore, the set of all triples of real numbers with the standard vector addition but with scalar multiplication defined by k(x, y, z) = (k²x, k²y, k²).

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Answer:

---------------------

According to the box plot we have:

The IQR is the difference of Q3 and Q1:

Answer: The options for which the extreme value theorem guarantees the existence of an absolute maximum and minimum are b, c, and d.

Step-by-step explanation:

The extreme value theorem guarantees the existence of an absolute maximum and minimum on a closed and bounded interval. Let's check each function given in the options:a. f(x) = ln(1-x) over [0, 2]

The function f(x) is not defined for x >= 1, which means the interval [0, 2] is not closed. Therefore, the extreme value theorem does not apply to this function on this interval.b. g(x) = ln(1+x) over [0, 2]

The function g(x) is defined on the closed and bounded interval [0, 2]. Also, g(x) is continuous on this interval, which means the extreme value theorem applies. Therefore, there exist an absolute maximum and minimum on this interval.c. h(x) = x-1 over [1, 4]

The function h(x) is defined on the closed and bounded interval [1, 4]. Also, h(x) is continuous on this interval, which means the extreme value theorem applies. Therefore, there exist an absolute maximum and minimum on this interval.d. k(x) = x-1/ x over [1, 4]

The function k(x) is defined and continuous on the closed and bounded interval [1, 4], which means the extreme value theorem applies. Therefore, there exist an absolute maximum and minimum on this interval.

Therefore, the options for which the extreme value theorem guarantees the existence of an absolute maximum and minimum are b, c, and d.

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the P-value (0.0000316) is less than the significance level of 0.01, we reject the null hypothesis. This means that the teacher can conclude that the students have indeed mastered the material in their statistics unit, based on the results of the pretest and posttest.

To determine the P-value and draw a conclusion, the teacher can use a one-tailed paired t-test since the same group of students took both the pretest and posttest. The null hypothesis is that the mean difference between pretest and posttest scores (μd) is equal to zero, and the alternative hypothesis is that μd is greater than zero.

Using a calculator or statistical software, the teacher can calculate the paired t-statistic for the data:

t = (x(bar)d - μd) / (s / √n)

Where x(bar)d is the sample mean of the difference scores, μd is the hypothesized population mean difference (0), s is the sample standard deviation of the difference scores, and n is the sample size (20).

Plugging in the values from the table, we get:

x(bar)d = 5.75

s = 4.091

n = 20

t = (5.75 - 0) / (4.091 / √20) = 4.67

Using a t-distribution table with 19 degrees of freedom (df = n-1), the P-value for this one-tailed test is 0.0000316.

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The correct way to complete the sentence is:A(n) tort occurs when a company interferes in the business relationships of another company.

A tort is defined as a wrongful act or infringement of a right leading to civil legal liability. Torts may include fraud, negligence, and misconduct, among other things.In the case of interference in the business relationships of another company, it is known as tortious interference.

Tortious interference happens when a person or company, known as the tortfeasor, purposely harms the plaintiff's legal relationships with a third party, resulting in economic damage. The harm done may be in the form of disrupting business operations or creating negative rumors about the other company.

The plaintiff must prove that the interference was deliberate, and that the resulting economic loss was due to the tortfeasor's actions.The tortfeasor must have known about the relationship, intended to interfere with it, and caused the resulting harm.

Tortious interference claims may be brought in either criminal or civil court, with the latter resulting in compensation for economic damages.

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The graph of the function g(x) is the graph (a) i.e. the top left

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

f(x) = x²

See attachment for the possible graphs of the functions

The function g(x) is given as

g(x) = (x + 1)²

This means that

The function f(x) is shifted up by 1 unit to get the function

Using the above as a guide, we have the following:

The graph of the function g(x) is the graph (a) i.e. the top left

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The answer is b. 10 hours.

The bag contains 1000 mL of fluid (1 liter = 1000 mL). At a rate of 100 mL/hr, the bag will infuse 100 mL every hour. To determine how long the bag will last, we need to divide the total volume of fluid by the infusion rate:
1000 mL ÷ 100 mL/hr = 10 hours
Therefore, the bag of fluid will last for 10 hours at a rate of 100 mL/hr.

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We use integration by parts with the formula:

∫u dv = uv - ∫v du

In this case, we choose:

u = ln(x), dv = x^4 dx

Then we have:

du = (1/x) dx

v = ∫x^4 dx = (1/5)x^5 + C

where C is the constant of integration.

Using the formula, we get:

∫x^4 ln(x) dx = u v - ∫v du

= ln(x) [(1/5)x^5 + C] - ∫[(1/5)x^5 + C] (1/x) dx

= ln(x) [(1/5)x^5 + C] - (1/25)x^5 - C ln(x) + C

= (1/5)ln(x) x^5 - (1/25)x^5 + C

Therefore, the integral of x^4 ln(x) dx is (1/5)ln(x) x^5 - (1/25)x^5 + C.

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To estimate the number of eighth-grader students in your school who find it relaxing to listen to music, you consider two samples.Fifteen randomly selected members of the band and every fifth student whose name appears on an alphabetical list of eighth-grade students.

The work for this estimation is as follows:Sample 1: Fifteen randomly selected members of the band.If the band is a representative sample of eighth-grade students, we can use this sample to estimate the proportion of students who find it relaxing to listen to music.

We select fifteen randomly selected members of the band and find that ten of them find it relaxing to listen to music. Therefore, the estimated proportion of eighth-grader students in your school who find it relaxing to listen to music is: 10/15 = 2/3 ≈ 0.67.Sample 2: Every fifth student whose name appears on an alphabetical list of eighth-grade students.Using this sample, we take every fifth student whose name appears on an alphabetical list of eighth-grade students and ask them if they find it relaxing to listen to music.

We continue until we have asked thirty students. If there are N students in the eighth grade, the total number of students whose names appear on an alphabetical list of eighth-grade students is also N. If we select every fifth student, we will ask N/5 students.

we need N/5 ≥ 30, so N ≥ 150. If N = 150, then we will ask thirty students and get an estimate of the proportion of students who find it relaxing to listen to music.To find out how many students we need to select, we have to calculate the interval between every fifth student on an alphabetical list of eighth-grade students,

which is: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150

We select students numbered 5, 10, 15, 20, 25, and 30 and find that three of them find it relaxing to listen to music. Therefore, the estimated proportion of eighth-grader students in your school who find it relaxing to listen to music is: 3/30 = 1/10 = 0.10 or 10%.Thus, we can estimate that the proportion of eighth-grader students in your school who find it relaxing to listen to music is between 10% and 67%.

To estimate the number of eighth-grade students who find it relaxing to listen to music, you can use two sampling methods: sampling from the band members and sampling from an alphabetical list of eighth-grade students.

Sampling from the Band Members:

Selecting fifteen randomly selected members of the band would give you a sample of band members who find it relaxing to listen to music. You can survey these band members and determine the proportion of them who find it relaxing to listen to music. Then, you can use this proportion to estimate the number of band members in the entire eighth-grade population who find it relaxing to listen to music.

Sampling from an Alphabetical List:

Every fifth student whose name appears on an alphabetical list of eighth-grade students can also be sampled. By selecting every fifth student, you can ensure a random selection across the entire population. Surveying these selected students and determining the proportion of those who find it relaxing to listen to music will allow you to estimate the overall proportion of eighth-grade students who find it relaxing to listen to music.

Both sampling methods can provide estimates of the proportion of eighth-grade students who find it relaxing to listen to music. It is recommended to use a combination of these methods to obtain a more comprehensive and accurate estimate.

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Answer:

Vertical angles are a pair of opposite angles formed by intersecting lines. In the figure, ∠1 and ∠3 are vertical angles. So are ∠2 and ∠4 . Vertical angles are always congruent .

Step-by-step explanation:

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