a drug company is testing a new cold medication for children. the average child's cold symptoms last for 7 days. the company tested 500 children with a cold and found that 250 of them shortened their cold symptoms when taking the new drug with a standard deviation of 5.7. assuming this to be a random sampling, how could the company explain their margin of error over a 99% confidence interval. is the new cold medication reliable?

With given coordinates of the endpoints of line, the length is 17.75 units.

What are coordinates ?

Coordinates are a set of numbers that describe the position or location of a point in space. In a two-dimensional plane, coordinates are typically represented by two values, an x-coordinate and a y-coordinate, which describe the horizontal and vertical position of a point, respectively.

Now,

The length of a line segment in a two-dimensional plane can be calculated using the distance formula:

d=√[(x₂ - x₁)² + (y₂ - y₁)²]

where (x₁, y₁) and (x₂, y₂) = coordinates of the endpoints of the line segment

In this case, the coordinates of the endpoints are (4.25, 6.25) and (22, 6.25)

d = √[(22 - 4.25)² + (6.25 - 6.25)²]

= √[(17.75)² + (0)²]

= √(315.0625)

= 17.75

Therefore,

             the length will be  17.75 units.

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Multiple regression is a technique which allows researchers to explain a criterion variable through an accurate

combination of two or more predictor variables.

Regression is a statistical measure used in finance, investing and other disciplines that attempts to determine the

strength of the relationship between one dependent variable (usually denoted by Y) and a series of other changing

variables (known as independent variables).

Multiple regression is a statistical method used to analyze the relationship between a dependent variable and multiple

independent variables.

It is often used to estimate the effect of a single independent variable on a dependent variable while controlling for

other independent variables.

Multiple regression is a technique that allows researchers to explain a criterion variable through an accurate

combination of two or more predictor variables.

In summary, multiple regression is a technique that allows researchers to explain a criterion variable through an

accurate combination of two or more predictor variables.

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Answer:

Option C.

Step-by-step explanation:

Gross pay = (total hours works) * pay rate

                 = (4.7 + 7.3 + 6.4 + 5.8 + 5.4) * 12.1

                 = 29.6 * 12.1

                 = $358.16

This number is closest to 354.53, so C is the correct answer.

To solve the equation \begin{equation}-\log{\left(x^2 - 15\right)} = \log{\left(2x\right)}\end{equation}, the following steps can be taken:

Apply the logarithmic identity log(a) = log(b) if and only if a = b to obtain the equation x^2 - 15 = 2x.

Move all the terms to one side of the equation to get x^2 - 2x - 15 = 0.

Factor the quadratic expression to obtain (x - 5)(x + 3) = 0.

Use the zero product property, which states that if the product of two factors is zero, then at least one of the factors must be zero, to get x - 5 = 0 or x + 3 = 0.

Solve for x in each equation to obtain x = 5 or x = -3.

Therefore, the steps to solve the equation log(x^2 - 15) = log(2x) from 1 to 5 are:

Apply the logarithmic identity to get x^2 - 15 = 2x.

Move all the terms to one side of the equation to get x^2 - 2x - 15 = 0.

Factor the quadratic expression to obtain (x - 5)(x + 3) = 0.

Use the zero product property to get x - 5 = 0 or x + 3 = 0.

Solve for x in each equation to obtain x = 5 or x = -3.

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Answer:

0.098

Step-by-step explanation:

x = 6 is a valid solution to the equation 3x + 5 = 23.

However, we can give you some general tips on how to approach a math problem when given a specific value of a variable like x = 6:1. Identify the equation or problem that involves x.2.

Replace every instance of x in the equation with the given value, which in this case is 6.3.

Simplify the equation by performing any necessary operations (addition, subtraction, multiplication, division, etc.)4. Solve for the unknown value if possible.

For example, if the equation is 3x + 5 = 23 and x = 6, we would replace every instance of x with 6:

3(6) + 5 = 23

Simplify by multiplying 3 and 6 and adding 5:

18 + 5 = 23

Simplify further by adding 18 and 5: 23 = 23.

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To find the probability that a student break lasts more than 7 minutes, we can use the z-score formula to standardize the break time and then use the standard normal distribution table or a calculator to find the probability. The probability that a student break lasts more than 7 minutes is approximately 0.3745 or 37.45%.

Step 1: Calculate the z-score.
The z-score formula is given by:
z = (X - μ) / σ
where X is the break time, μ is the mean, and σ is the standard deviation. In this case, X = 7 minutes, μ = 6.3 minutes,

and σ = 2.2 minutes. Plugging in these values:
z = (7 - 6.3) / 2.2 ≈ 0.32
Step 2: Find the probability using the standard normal distribution table or a calculator.
Now that we have the z-score, we can find the probability that a student break lasts more than 7 minutes. We want to find the area to the right of the z-score (0.32) since we are interested in break times longer than 7 minutes.
Using a standard normal distribution table or a calculator, we find that the area to the left of z = 0.32 is approximately 0.6255. However, we want the area to the right of z = 0.32, which is given by:
Area to the right of z = 1 - Area to the left of z
Area to the right of z ≈ 1 - 0.6255 ≈ 0.3745.

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Burger Quick's box plot has a larger IQR than Super Fast Food's, hence Super Fast Food is better able to predict their wait time

A measurement of statistical dispersion, or the spread of the data, is the interquartile range (IQR). It is described as the variation between the data's 75th and 25th percentiles. The fourth spread, middle 50%, midspread, or H-spread1 are further names for the IQR.

The dataset is displayed using a box plot, which is a standardized method based on the five-number summary of the minimum, maximum, sample median, and first and third quartiles

The box plot displays measurements made from data acquired from interviews with 20 people on how long they waited at a drive-through restaurant window.

Burger Quick's box plot has a larger IQR than Super Fast Food's, hence Super Fast Food is better able to predict their wait time.

A data set is divided into quartiles to calculate the IQR (Interquartile Range), which is a measure of variability. The first quartile (Q1) is subtracted from the third quartile (Q3) to determine it.

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Based on the above, the equivalent equations are 4x = 15 and 4x - 15 = 0.Hence options A and C are correct.

To determine which equations are equivalent to 3x + 5 = 20 - x, we need to simplify and manipulate the original equation until it has the same form as the other equations. Here's how we can do it:

3x + 5 = 20 - x

Add x to both sides:

4x + 5 = 20

Subtract 5 from both sides:

4x = 15

So the equation 4x = 15 is equivalent to 3x + 5 = 20 - x.

Therefore, the other equations are not equivalent:

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Select all of the equations that are equivalent to 3x + 5 = 20 - x.

4x = 15

2x = 25

4x  - 15 = 0

-4x+20 = -5

x - 20 = 5 + 3x

The calculated area of the wall art is 474 square inches

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

The composite figure

The area of the figure is the sum of the individual areas

So, we have

Area = 21 * 9 + 9 * 19 + 6 * 19

So, we have

Area = 474

Hence, the area is 474 square inches

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The determinant of the given matrix is -51.

A square matrix's related scalar value is known as a determinant. It is calculated based on the matrix's components using a specified formula. The determinant has several uses in linear algebra, including the resolution of systems of linear equations, the discovery of eigenvalues and eigenvectors, and the assessment of invertibility. If and only if a matrix's determinant is nonzero, the matrix is invertible. The determinant is also employed in other branches of mathematics, such as differential geometry and the determination of the volume of parallelepipeds.

The determinant of the matrix is calculated using the formula:

D = a(ei - fh) - b(di - fg) + c(dh - eg)

Substituting the values we have:

3(-20 - 5(-1)) - (-1)(20 - 54) + 4(2*(-1) - (-2)*(-1)) = -51

Hence, the determinant of the given matrix is -51.

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A cylinder with a radius of 3 ft and a height of 4 ft has the same volume as one with a radius of 4 ft and a height of 9 ft.

We can determine how much interior room a cylinder has by measuring its volume. The volume would be the same as how much material would fill the full can if you had one.

Volume of cylinder = π*r²*h

r is the radius and h is the height.

For given cylinder:

r = 4 ft and h = 9 ft

Volume of given cylinder = π*4²*9

Volume of given cylinder = 144π cu. ft.

Now, from the options:

As, its is clear from  formula of cylinder that there is a square of radius.

Thus,

take radius r = 3 ft  such that r² = 9 ft and height h = 4 ft.

These are the same dimensions as the given cylinder.

Thus, a cylinder with a radius of 3 ft and a height of 4 ft has the same volume as one with a radius of 4 ft and a height of 9 ft.

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The quantities that are less than 16 cups are: 6 pints (A) and 3 quarts (E).

let's convert each option to cups:

A. 6 pints: There are 2 cups in a pint, so 6 pints × 2 cups/pint = 12 cups.

B. 1 gallon: There are 16 cups in a gallon, so 1 gallon = 16 cups.

C. 5 quarts: There are 4 cups in a quart, so 5 quarts × 4 cups/quart = 20 cups.

D. 8 pints: There are 2 cups in a pint, so 8 pints × 2 cups/pint = 16 cups.

E. 3 quarts: There are 4 cups in a quart, so 3 quarts × 4 cups/quart = 12 cups.

Now, let's see which options are less than 16 cups:

A. 6 pints: 12 cups (less than 16 cups)

B. 1 gallon: 16 cups (not less than 16 cups)

C. 5 quarts: 20 cups (not less than 16 cups)

D. 8 pints: 16 cups (not less than 16 cups)

E. 3 quarts: 12 cups (less than 16 cups)

So, the quantities that are less than 16 cups are: 6 pints (A) and 3 quarts (E).

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The length, breadth, and height of the rectangular block are 256 cm, 192 cm, and 320 cm respectively.

To calculate the length, breadth, and height of a rectangular block whose ratio is 4:3:5 and its volume is 3840 cm3,

follow the steps below:

The ratio of length, breadth, and height is 4:3:5 respectively.

Therefore, assume the length to be 4x, the breadth to be 3x, and the height to be 5x, where x is the common factor.

Then, the volume of the block is calculated as:

Volume = length × breadth × height= 4x × 3x × 5x= 60x³

Since the volume of the block is 3840 cm³, we can equate the equation above to 3840 and solve for x, then find the

length, breadth, and height.

60x³ = 3840 x³ = 3840/60 x³ = 64

Length = 4x = 4 × 64 = 256 cm

Breadth = 3x = 3 × 64 = 192 cm

Height = 5x = 5 × 64 = 320 cm

Therefore, the length, breadth, and height of the rectangular block are 256 cm, 192 cm, and 320 cm respectively.

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Accοrding tο the given infοrmatiοn, the equatiοn y = -3x - 2 represents the same line as the equatiοn 3y+3x=2y-2.

An equatiοn is a mathematical assertiοn that prοves the equality οf twο expressiοns. The equals sign (=) separates the twο sides, which make up the οbject. The expressiοns in the equatiοn's twο sides may include numerical values, variables, and mathematical οperatiοns like additiοn, subtractiοn, multiplicatiοn, and divisiοn.

Tο turn the equatiοn 3y+3x=2y-2 intο the y=mx+b fοrm, yοu need tο isοlate y οn οne side οf the equatiοn.

First, simplify the left-hand side οf the equatiοn by cοmbining the like terms οf 3y and 3x:

3y + 3x = 2y - 2

3y - 2y = -3x - 2

y = -3x/1 - 2/1

Nοw, the equatiοn is in the y=mx+b fοrm, where m is the slοpe and b is the y-intercept. In this case, the slοpe m is -3 and the y-intercept b is -2.

Therefοre, the equatiοn y = -3x - 2 represents the same line as the equatiοn 3y+3x=2y-2.

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We can approach this problem by first finding the two perfect squares that 240 lies between:

15^2 = 225 and 16^2 = 256.

Since the square root of 240 must lie between the square root of 225 and 256, we can choose the number that is closest between 15 and 16.

To do this, we can calculate the distance between the square root of 240 and each of the two numbers:

The distance between 15 and the square root of 240 is |15 - sqrt(240)| = 1.18

The distance between 16 and the square root of 240 is |16 - sqrt(240)| = 0.34

Therefore, 16 is closest to the square root of 240.

Answer:

The two expressions that are equivalent are:

B) 4 divided by 1 and 1/4,

D) 9 divided by 2 and 4/9

Answer: i believe its c

Step-by-step explanation: a division symbol and a fractions bar can mean the same thing.

The range of standard IQR (Interquartile Range) numbers is option b) 0-15. The correct option is B).

The interquartile range (IQR) is a measure of variability used in statistical analysis. The IQR is often used as a measure of spread because it is less sensitive to outliers than the range. Standard IQR numbers are values that have been standardized to fit within a specific range of 0-15.

Standardizing the IQR allows for easier comparison of data across different datasets, as it ensures that the IQR values fall within a consistent range. The range of standard IQR numbers is often used in educational assessments and other standardized tests to report the variability of student performance or other metrics. So, the correct answer is option B).

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1. To get a systematic sample with a random number table, divide the population size by the desired sample size to obtain the sampling interval, select a random starting point from the first n values where n is the sampling interval, and choose every nth value until the sample size is reached.

2. The nth value is found by dividing the population size by the desired sample size.

Determine the total number of items in the population (N) that you want to sample from. Decide on the desired sample size (n) that you want to obtain from the population.

Calculate the sampling interval (k) by dividing the population size by the desired sample size: k = N / n. Choose a random starting point between 1 and k.

Select every kth item in the population from the starting point until the desired sample size is reached. If the last selection exceeds the population size, start again from the beginning.

The nth value would be the sampling interval (k), which is calculated by dividing the population size by the desired sample size.

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The value of f(3) is 6.25 billion, which is option B.

What is Function ?

In mathematics, a function is a rule that associates each input value (also known as the independent variable) with a unique output value (also known as the dependent variable). It is a mathematical object that takes one or more input values and produces an output value.

The input values are usually taken from a set called the domain, and the output values are taken from a set called the range.

We can use the given formula to find the value of f(3) as follows:

f(2) = f(1) + 0.25f(1) = 4.0 billion + 0.25(4.0 billion) = 5.0 billion

f(3) = f(2) + 0.25f(2) = 5.0 billion + 0.25(5.0 billion) = 6.25 billion

Therefore, the value of f(3) is 6.25 billion, which is option B.

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Step-by-step explanation & Answer

C = 2pir = 2pi(13) = 26pi = 81.68"

Which we can easily find.

But that is for 1 rotation in the question it says 5!

So multiply it by 5

81.68 x 5 = 408.4

Thus the answer to your problem is, 408.4

Answer:408.4

Step-by-step explanation:

the fertilizer bag states that 5 1/2 bags are required for 1 acre. then Jasper needs 33/8 bags of fertilizer to fertilize his lawn.

To solve this problem, you need to find out how many bags of fertilizer Jasper needs to fertilize his lawn, which is 3/4 of an acre in size.

To do this, you need to use the information given on the fertilizer bag, which states that 5[tex]\frac{1}{2}[/tex]  bags are required for 1 acre of land.

You can then set up a proportion to find out how many bags Jasper needs. Since Jasper's lawn is 3/4 of an acre in size, you can set up the proportion as follows:

5 [tex]\frac{1}{2}[/tex] bags / 1 acre = x bags / 3/4 acre

To solve for x, you can cross-multiply and simplify:

5 1/2 bags * 3/4 acre = x bags * 1 acre

(11/2) * (3/4) = x

(33/8) = x

Therefore, Jasper needs 33/8 bags of fertilizer to fertilize his lawn. You would multiply in this problem to solve for the unknown variable, x, which represents the number of bags of fertilizer that Jasper needs.

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Six can be represented using 3 bits, but 2⁴ = 16 unique numbers can be represented using four bits. However, 20 can be represented using 5 bits since 2⁵ = 32 unique numbers can be represented using five bits.

The question "show that the numbers 0 to 7 can be written using 3 binary digits (bits).Binary numbers are constructed by concatenating bits (binary digits).

Each bit can take on one of two values: 0 or 1. Binary notation is frequently utilized in computer engineering to represent data, instructions, and addresses. Three bits can represent 2³ = 8 unique numbers since each bit has two options (0 or 1).

Thus, the numbers 0 to 7 can be represented using 3 bits since 2³ = 8. We can also figure out how many bits are required to represent the numbers 0 to 6 or 0 to 20.

Six can be represented using 3 bits, but 2⁴ = 16 unique numbers can be represented using four bits. However, 20 can be represented using 5 bits since 2⁵ = 32 unique numbers can be represented using five bits.

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The probability that the weight of a randomly selected steer is between 1000 and 1520lbs is approximately 0.9192, or 91.92%.

Standard deviation = sqrt(variance) = sqrt(40,000) = 200

z = (x - μ) / σ

where z is the standardized value, x is the value of interest, μ is the mean, and σ is the standard deviation.

For x = 1000:

z1 = (1000 - 1100) / 200 = -0.5

For x = 1520:

z2 = (1520 - 1100) / 200 = 2.1

Using a calculator, we can use the normal cdf function with the z-scores to find the area between z1 and z2:

P(z1 < z < z2) = normal cdf(-0.5, 2.1) ≈ 0.9192

Rounding to four decimal places, we get:

P(1000 < x < 1520) ≈ 0.9192

Therefore, the probability that the weight of a randomly selected steer is between 1000 and 1520lbs is approximately 0.9192, or 91.92%.

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Given that √7 is a solution to the equation x² = 7, we can use this equation to find a decimal approximation of √7 that satisfies the given condition.

First, we can estimate that √7 is between 2.5 and 3, since 2² = 4 < 7 and 3² = 9 > 7.

Next, we can try using a decimal approximation of √7, such as 2.6 or 2.7, and square it to see if the result is between 6.9 and 7.1.

If we try 2.6, we get:

(2.6)² = 6.76

Since this is less than 6.9, we can try a larger value, such as 2.7:

(2.7)² = 7.29

Since this is greater than 7.1, we can try a value between 2.6 and 2.7, such as 2.65:

(2.65)² = 7.0225

This result is between 6.9 and 7.1, so a decimal approximation of √7 that satisfies the given condition is approximately 2.65.

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Answer:

81

Step-by-step explanation:

For 1 rod:

V = πr²h

V = 3.14 × (3 cm)² × 20 cm

V = 565.2 cm³

Total volume of steel used: 45,781.2 cm³

45,781.2 cm³ / 565.2 cm³ = 81

Answer: 81

The fractions that are equivalent to 14 are 28 2 over 8 520 5 over 20 416 4 over 16.

To find the fraction = 14, multiply or divide both the numerator and denominator of 14 by the same number.

The fraction 14 can be written as 14/1.

Multiplying the numerator and denominator of 14/1 by 2 gives:

28/2 = 14

Multiplying the numerator and denominator of 14/1 by 3 gives:

42/3 = 14

Multiplying the numerator and denominator of 14/1 by 4 gives:

56/4 = 14

28/2 = 14

70/5 = 14

So the fraction corresponding to 14 is:

28/2

42/3

56/4

70/5

Of the choices given in the question, only 28 equals 2/8, and 56 equals 4/16 14. Any other option is wrong.

So the correct answer is:

28 2/8

56 4/16 . 

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Answer:

106.25

Step-by-step explanation:

Answer: The answer is 106.25

Step-by-step explanation: I used a calculator and just multiplied them both.