Can someone please help me ASAP? It’s due tomorrow. Show work please

(a) We will use the "t" as test-statistics and the value of "t" is t = -0.87.

(b) We will use "z" as the test-statistics and the value of "z" is z = -0.77.

In statistics, a test statistic is a numerical summary of a sample that is used to make an inference about a population parameter. It is calculated from the sample data and is used to test a hypothesis or to make a decision about some characteristic of the population.

Part (a) : In this case, we do not know the "standard-deviation",

the case in which standard-deviation is un-known, "t" is used as a "test-statistics.

The Standard-error-of-mean (SE) is = s/√n = 0.5/√19 = 0.1148.

So, "t" = (mean - 2.5)/SE,

Substituting the values,

We get,

t = (2.4 - 2.5)/0.1148 = -0.87.

Part (b) : In this case, we know the "standard-deviation",

The case in which standard-deviation is known, "z" is used as a "test-statistics.

The Standard-error-of-mean (SE) is = s/√n = 0.45/√12 = 0.1299.

So, "z" = (mean - 2.5)/SE,

Substituting the values,

We get,

z = (2.4 - 2.5)/0.1299 = -0.77.

Therefore, the value of "z" is -0.77.

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The given question is incomplete, the complete question is

We want to conduct a hypothesis test of the claim that the population mean time it takes drivers to react following the application of brakes by the driver in front of them is more than 2.5 seconds. So, we choose a random sample of reaction time measurements. The sample has a mean of 2.4 seconds and a standard deviation of 0.5 seconds.

For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places.

(a) The sample has size 19, and it is from a non-normally distributed population with an unknown standard deviation.

Which test-statistic will you use z, t or It is unclear which test statistic to use.

(b) The sample has size 12,and it is from a normally distributed population with an known standard deviation of 0.45.

Which test-statistic will you use z, t or It is unclear which test statistic to use.

The probability that a CD player will break down during the guarantee period is about 0.1985 or 19.85%.

To find the probability that a Sunshine CD player will break down during the 3-year guarantee period, we'll use the properties of the normal distribution.

Given a mean life of 4.1 years and a standard deviation of 1.3 years, we can calculate the z-score corresponding to the 3-year guarantee period:

z = (x - μ) / σ = (3 - 4.1) / 1.3 ≈ -0.846

Now, we'll look up the probability associated with this z-score in a standard normal distribution table, or use a calculator or software to find the cumulative probability. The probability corresponding to a z-score of -0.846 is approximately 0.1985.

Therefore, the probability that a CD player will break down during the guarantee period is about 0.1985 or 19.85%.

For the sketch, draw a bell-shaped curve to represent the normal distribution. Mark the x-axis with the mean (4.1 years) in the center, and scale it with the standard deviation (1.3 years).

Place a vertical line at 3 years to represent the end of the guarantee period, and shade the area to the left of this line to represent the probability of breaking down during that period.

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The next term in the sequence of the series which have groups of 1, 4, and 7 is 10.

The fundamental concepts in mathematics are series and sequence. A series is the total of all components, but a sequence is an ordered group of items in which repeats of any kind are permitted. One of the typical examples of a series or a sequence is a mathematical progression.

We have the series as 1, 4, 7, ....

First term = a = 1

Common difference = d = 3

Using the formula for the Term is

T = a + (n-1)d

T = 1 + (n-1)3

= 1 + 3n - 3

T = 3n - 2

To find the next term in the series we need to find the 4th term so

T₄ = 3(4) - 2

= 12 - 2

T₄ = 10.

The domain of the sequence T = 3n - 2 is all Real numbers n ∈ Real numbers.

The range is given as

R ∈ (-∞, ∞).

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Answer:

1, 4, and 7 is 10

Step-by-step explanation:

The pattern sequence follows the add 3 rule so, the next term in the sequence will be 10.

The index of the terms of represents the domain of a function, which is { 1, 2, 3, . . .}.

The range includes the terms of the sequence {1, 4, 7, . . .}.

The value of m is 11, and the divisibility test states that n is divisible by 11 if and only if the alternating sum of its two-digit chunks is divisible by 11.

Let's consider the given divisibility test proposed by Lizzie. The process involves breaking a positive integer, n, into two-digit chunks and finding the alternating sum of these chunks. The alternating sum is obtained by adding the first number, subtracting the second, adding the third, and so on.

To find the value of m that makes this a divisibility test, we need to analyze the properties of this test. Let's assume that n is divisible by m.

When n is divisible by m, each two-digit chunk in n will also be divisible by m. This means that the alternating sum of these chunks will also be by m since adding or subtracting multiples of m will not change its divisibility.

Conversely, if the alternating sum of the two-digit chunks is divisible by m, it implies that each chunk is divisible by m. Therefore, if the chunks are divisible by m, the original number n will also be divisible by m.

Hence, this process indeed serves as a divisibility test for m, where n is divisible by m if and only if the result of the alternating sum of the two-digit chunks is divisible by m.

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There are 225 possible outcomes in the sample space if the spinner is spun twice

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

Spinner

The number of sections in the spinner is

n = 15

If the spinner shown is spun twice, then we have

Outcomes = n²

Substitute the known values in the above equation, so, we have the following representation

Outcomes = 15²

Evaluate

Outcomes = 225

Hence, the possible outcomes are in the sample space are 225

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The absolute value of -8 1/2 is less than the absolute value of -9 1/2.

To compare the absolute values of -8 1/2 and -9 1/2, follow these steps:
1. Convert the mixed numbers to improper fractions:
-8 1/2 = -17/2
-9 1/2 = -19/2

2. Find the absolute values of both numbers:
|-17/2| = 17/2
|-19/2| = 19/2

3. Compare the absolute values and choose the correct symbol:
17/2 < 19/2
So, the statement is: The absolute value of -8 1/2 is less than the absolute value of -9 1/2.

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The ordered pairs of the inequality expression is (0, 4)

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

The inequality expression  y>1/2x+3

To determine the ordered pairs of the inequality expression, we set x - 0 and then calculate the value of y

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

y > 1/2 * 0 + 3

Evauate

y > 3

This means that the value of y is greater than 3 say y = 4

So, we have (0, 4)

Hence, the ordered pairs of the inequality expression is (0, 4)

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a. The total length of time, T, it will take for the dog to reach the frisbee is  143.22

b. A natural closed interval that limits reasonable values of x is  [0, 220] is a reasonable closed interval for x.

c. The value of x that will minimize the time, T, that it takes for the dog to retrieve the frisbee is 143.22

Let's start by breaking down the problem into two parts: the time it takes for the dog to run along the shore, and the time it takes for the dog to swim in the water. Let's call the distance the dog runs along the shore "d1" and the distance the dog swims in the water "d2".

To find d1, we can use the Pythagorean theorem:

d1 = sqrt(x^2 + 60^2)

To find d2, we can use the fact that the total distance the dog travels is equal to 220 feet:

d2 = 220 - x

Now we can use the formulas for distance, rate, and time to find the total time it takes for the dog to retrieve the frisbee:

T = d1/13 + d2/4.3

Substituting our expressions for d1 and d2, we get:

T = [sqrt(x^2 + 3600)]/13 + (220 - x)/4.3

To find the value of x that minimizes T, we can take the derivative of T with respect to x, set it equal to zero, and solve for x:

dT/dx = x/13sqrt(x^2 + 3600) - 1/4.3 = 0

Multiplying both sides by 13sqrt(x^2 + 3600), we get:

x = (13/4.3)sqrt(x^2 + 3600)

Squaring both sides and solving for x, we get:

x ≈ 143.22

So the dog should enter the water after running about 143.22 feet down the shoreline to minimize the total time it takes to retrieve the frisbee.

To check that this is a minimum, we can take the second derivative of T with respect to x:

d^2T/dx^2 = (13x^2 - 46800)/(169(x^2 + 3600)^(3/2))

Since x^2 and 3600 are both positive, the numerator is positive when x is not equal to zero, and the denominator is always positive. Therefore, d^2T/dx^2 is always positive, which means that x = 143.22 is indeed the value that minimizes T.

As for the natural closed interval that limits reasonable values of x, we know that x has to be greater than zero (since the dog needs to run at least some distance along the shoreline before entering the water), and it has to be less than or equal to 220 (since the frisbee is 220 feet down the shoreline from the dog). So the interval [0, 220] is a reasonable closed interval for x.

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The equation for the red graph is y = f(x - 1) (option a)

Graphs are visual representations of mathematical functions that help us understand their behavior and properties.

In this problem, we are given a black graph that represents the function y=f(x), and we need to choose the equation that represents the red graph. Let's examine each option and see which one fits the red graph.

Option (a) y = f(x - 1) represents a shift of the function f(x) to the right by one unit. This means that every point on the black graph will move one unit to the right to form the red graph.

However, from the given graph, we can see that the red graph is not a shifted version of the black graph. Therefore, option (a) is not the correct answer.

Hence the correct option is (a).

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he estimated proportion of teens who smoked cigarettes in the last 30 days is 0.05815 or 5.815%. This result suggests that cigarette use among teens is down, as stated in the National Youth Tobacco Survey conducted by the US Centers for Disease Control.

It is mentioned that the 2019 preliminary results show that e-cigarette use is up among US teens while cigarette use is down. In the sample of 1582 teens, 92 reported smoking a cigarette in the last 30 days.

To estimate the proportion of teens who smoked cigarettes in the last 30 days, follow these steps:

Step 1: Find the total number of teens in the sample.
There were 1582 teens in the sample.

Step 2: Find the number of teens who reported smoking a cigarette in the last 30 days.
92 teens reported smoking a cigarette in the last 30 days.

Step 3: Calculate the proportion of teens who smoked cigarettes in the last 30 days.
Divide the number of teens who smoked cigarettes (92) by the total number of teens in the sample (1582).

Proportion = 92 / 1582 = 0.05815 (rounded to 5 decimal places)

So, the estimated proportion of teens who smoked cigarettes in the last 30 days is 0.05815 or 5.815%. This result suggests that cigarette use among teens is down, as stated in the National Youth Tobacco Survey conducted by the US Centers for Disease Control.

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Answer:

Step-by-step explanation:

cos²x =3sin²x                     subtract both sides by 3sin²x

cos²x - 3sin²x = 0               use identity  cos²x+sin²x=1  => cos²x = 1-sin²x

                                           substitute in

(1-sin²x)-3sin²x = 0             combine like terms

1-4sin²x=0                           factor using difference of squares rule

(1-2sin x)(1+2sin x)=0          set each equal to 0

(1-2sin x)=0                                        (1+2sin x)=0

-2sinx = -1                                               2sinx= -1

sinx=1/2                                                    sinx =-1/2

Think of the unit circle.  When is sin x = ±1/2

at [tex]\pi /6, 5\pi /6, 7\pi /6, 11\pi /6[/tex]

This is from 0<x<2[tex]\pi[/tex]

Answer:

c = 12

Step-by-step explanation:

[tex] {5}^{2} + {c}^{2} = {13}^{2} [/tex]

[tex]25 + {c}^{2} = 169[/tex]

[tex] {c}^{2} = 144[/tex]

[tex]c = 12[/tex]

The sample mean difference in heights for these 24 pairs of siblings is 1.79 inches. So the third option is correct.

The 95% confidence interval for the mean difference in heights for all brother-and-sister pairs in the population was (–0.76, 4.34).

This means that if we were to repeat this sampling process many times, we would expect 95% of the resulting confidence intervals to contain the true mean difference in heights for all brother-and-sister pairs in the population.

To find the sample mean difference from these 24 pairs of siblings, we take the midpoint of the confidence interval. The midpoint is the average of the lower and upper bounds, which is:

(-0.76 + 4.34) / 2 = 1.79

Therefore, the sample mean difference in heights for these 24 pairs of siblings is 1.79 inches.

So the correct answer is third option.

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Answer:

the answer is 14,986 centimetres

Uranus rotates on its axis at an angular speed of 0.355 radians per day, and a point on its equator travels at a linear speed of approximately 9,522 miles per day.

Uranus is one of the gas giants in our solar system, and it has a unique orientation compared to the other planets. Its axis of rotation is tilted at an angle of 97.77 degrees relative to its orbit around the Sun, which means that it essentially spins on its side. This also means that its equator is located in a plane perpendicular to its orbit, unlike Earth's equator, which is in the plane of its orbit.

Given that Uranus rotates on its axis once every 17.2 hours and its equator lies on a circle with a radius of 15,881 miles, we can calculate the angular and linear speed of a point on its equator.

Angular speed is a measure of the rate of change of an angle with respect to time. In this case, we want to know the angular speed of a point on Uranus' equator in radians per day. To find this, we can start by calculating the angle that a point on the equator travels in one day, which is equal to the angular speed times the time, or 2π radians (a full circle).

So, the angular speed of a point on Uranus' equator is:

(2π radians)/(24 hours) = 0.2618 radians per hour

To convert this to radians per day, we multiply by the number of hours in a day:

0.2618 radians/hour × 24 hours/day = 0.355 radians per day

Therefore, a point on Uranus' equator travels at an angular speed of 0.355 radians per day.

Linear speed is a measure of the rate of change of position with respect to time. In this case, we want to know the linear speed of a point on Uranus' equator in miles per day. To find this, we can use the formula:

Linear speed = angular speed × radius

Where the radius is the distance from the center of Uranus to a point on its equator, which we are given as 15,881 miles.

So, the linear speed of a point on Uranus' equator is:

0.355 radians/day × 15,881 miles = 9,521.9 miles per day

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Answer:

36!

Step-by-step explanation:

There is 3 brands of clothing each brand has short and long sleeve, and both come in 6 different colors.

multiply 6*2 (because 6 different colors per long and short sleeve) get 12, then you multiply 12 times 3 because each one is from a different brand.

IT MAY BE A BI CONFUSING I SUCK AT EXPLAINING BUT

YEAHHH!

Answer:

18shirts

Step-by-step explanation:

3×6=18 shirts

Emmanuel weighs 150 pounds and he has normal liver function. It will take him approximately 1 hour to metabolize one standard drink. Metabolism of alcohol is primarily done in the liver where it is broken down into acetaldehyde, which is then further broken down into water and carbon dioxide.

The liver can only metabolize a certain amount of alcohol per hour, which is why it takes time for the body to process and eliminate alcohol. However, other factors such as age, gender, body composition, and food consumption can also affect how quickly alcohol is metabolized.

It is important to drink responsibly and be aware of how alcohol can affect your body.

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The volume of the actual shoe store that Mai's company plans to build is 280,000 ft³.

Based on the given information, Mai created a scale model with a ratio of 1:20. If the volume of the model is 35 ft³, we can find the volume of the actual shoe store by using the ratio.

Since the ratio of the dimensions is 1:20, the ratio of the volumes will be (1:20)³, which is 1:8000. Therefore, to find the volume of the actual shoe store, we can multiply the volume of the model by 8000:

Volume of the actual shoe store = 35 ft³ × 8000 = 280,000 ft³

So, the volume of the actual shoe store that Mai's company plans to build is 280,000 ft³.

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The probability that is true is P(D or E) = 0.72.

Option D is the correct answer.

We have,

We can start by using the formula:

P(D and E) = P(D) x P(E)

Since D and E are independent events, their probabilities multiply to give the probability of both events happening together.

Plugging in the given values.

0.18 = 0.6 x P(E)

Solving for P(E).

P(E) = 0.18 / 0.6 = 0.3

So option (A) is not correct.

To find P(D or E), we can use the formula:

P(D or E) = P(D) + P(E) - P(D and E)

Plugging in the given values.

P(D or E) = 0.6 + 0.3 - 0.18 = 0.72

Thus,

P(D or E) = 0.72 is true.

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The probability we want to get is:

p(odd or multiple of 5) = 7/12

The probability is equal to the quotient between the number of outcomes for the given event and the total number of outcomes.

The numbers that are odd or multiples of 5 in the set of outcomes are:

{1, 3, 5, 7, 9, 10, 11}

So 7 outcomes out of 12, then the probability is:

P = 7/12

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The explanation of the continuous range is added below

Continuous ranges are expressed in inequality notation because they represent a set of infinitely many numbers between two endpoints.

Inequality notation allows us to describe this range using mathematical symbols to show that the values can be any number between the two endpoints, including the endpoints themselves.

For example, a continuous range might be described as "all real numbers between 0 and 1, including 0 and 1".

This can be expressed in inequality notation as 0 ≤ x ≤ 1, where x is a real number.

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Answer: B

Step-by-step explanation: 250 x 140% = 350

The population density of the fish is 0.0061sharks/m²

Population density is a measurement of population per unit land area. Therefore the population density can be expressed as;

population density = population/ area

The number of fish in the tank is 3

The area of the tank is given as!

A = 2πr( r+h)

h = 3meters

r = d/2 = 15/2 = 7.5

A = 2 × 3.14 × 7.5(7.5+3)

A = 47.1( 10.5)

A = 494.55 m²

Therefore population density = 3/494.55

= 0.0061sharks/m²

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Expression[tex]58(8b+8)[/tex]simplifies to[tex]464b+464.[/tex]

Calculate the product of 58 and the quantity 8b + 8

The given expression is:

[tex]58(8b + 8)[/tex]

Multiplying 58 by 8b and 8, we get:

[tex]464b + 464[/tex]

Therefore, the answer is:

[tex]58(8b + 8) = 464b + 464[/tex]

To find the product of 58 and the quantity 8b + 8, we need to use the distributive property of multiplication over addition, which states that the product of a number and a sum is equal to the sum of the products of the number and each term in the sum. In this case, we can distribute 58 over 8b and 8, as follows:

[tex]58(8b + 8) = 58 × 8b + 58 × 8[/tex]

Multiplying 58 by 8b and 8 separately, we get:

[tex]58 × 8b = 464b[/tex]

[tex]58 × 8 = 464[/tex]

Adding the products, we get the final answer:

[tex]58(8b + 8) = 464b + 464[/tex]

Therefore, the expression [tex]58(8b + 8)[/tex]simplifies to[tex]464b + 464.[/tex]

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Answer:

16 seconds

Step-by-step explanation:

The dimensions of the given rectangle is 2 1/2 meters (width) and 3 1/3 meters (length).

First, let's define the variables for the rectangle: let the width be w meters, and the length be (4/3)w meters since the length is 4/3 times the width. The area of a rectangle is calculated by multiplying its length and width. In this case, the given area is 8 1/3 square meters.

Now, we can write an equation using the area and dimensions:

Area = Length × Width
8 1/3 = (4/3)w × w

First, convert the mixed number 8 1/3 to an improper fraction, which is 25/3. Then, we can solve for w:

25/3 = (4/3)w²

To find w², multiply both sides by 3/4:

w² = (25/3) × (3/4)
w² = 25/4

Now, take the square root of both sides:

w = √(25/4)
w = 5/2

So, the width is 5/2 meters, or 2 1/2 meters. To find the length, multiply the width by 4/3:

Length = (4/3)(5/2) = 20/6 = 10/3

The length is 10/3 meters, or 3 1/3 meters. Therefore, the dimensions of the rectangle are 2 1/2 meters (width) and 3 1/3 meters (length).

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We can solve the quadratic equation 2x² - 8x + 5 = 0 by using the quadratic formula, which states that for an equation of the form ax² + bx + c = 0, the solutions are given by:

x = (-b ± sqrt(b² - 4ac)) / 2a

In this case, a = 2, b = -8, and c = 5. Substituting these values into the formula, we get:

x = (-(-8) ± sqrt((-8)² - 4(2)(5))) / (2(2))

x = (8 ± sqrt(64 - 40)) / 4

x = (8 ± sqrt(24)) / 4

x = (8 ± 2sqrt(6)) / 4

Simplifying the expression by factoring out a common factor of 2 in the numerator and denominator, we get:

x = (2(4 ± sqrt(6))) / (2(2))

x = 4 ± sqrt(6)

Therefore, the solutions to the equation 2x² - 8x + 5 = 0 are:

x = 4 + sqrt(6) or x = 4 - sqrt(6)

The values of the inverse trigonometric functions are 72°, 76° and 85°.

The range of the inverse trigonometric function is limited to a certain interval based on the domain of the original trigonometric function.

Its also important to identify the trigonometric ratio that corresponds to the given value.

The value on degree for inverse of sin (2/3) will be 41.81° which is 42°. Also, inverse of tan(4) is 76° using the calculator.

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Use a calculator to find the values of the inverse trigonometric functions. Round to the nearest degree.

inverse of sin (2/3)

inverse of tan(4)

inverse of tan (0.1)

a). The scale factor of shape A to B is 4/5

b) The value of t is 5.6cm

The scale factor is a measure for similar figures, who look the same but have different scales or measures.

Scale factor = dimension of new length/ dimension of old length

= 4/5 = 12/15

therefore the scale factor of from shape A to shape B is 4/5.

b) 4/5 = t/7

5t = 28

divide both sides by 5

t = 28/5

t = 5.6 cm

therefore the value of t is 5.6cm

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