In order to determine an interval for the mean of a population with unknown standard deviation, a sample of 24 items is selected. The mean of the sample is determined to be 23. The number of degrees of freedom for reading the t value is _____. Group of answer choices 21 22 23 24

The number of length of 4 feet they need is 8.

He wants to fence around there garden that measures 8 feet by 8 feet.

The store sells fencing in length of 4 feet's.

Therefore,

perimeter of the garden = 4l

where

The perimeter of a shape is the sum of the whole side.

Hence,

perimeter of the garden = 4 × 8

perimeter of the garden =  32 feet

Therefore,

number of length required = 32 / 4

number of length required =  8

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Answer:

d(p1,p2)=√9.04 units.

Explanation:

The distance between two points is calculated using the formula:

Given the two points:

Substitute into the formula given above:

The distance between points p and p2 is √9.04 units.

Answer:

14°

Step-by-step explanation:

Supplementary angles add up to 180° so subtract 166 from 180.

The number that is in between 76 and 80 is 78.

Answer:

65

Step-by-step explanation:

Method 1(Algebra):

m - 14 = 51

Add 14 to both sides of the equation.

m - 14 + 14 = 51 + 14

Combine like terms.

m = 65

Method 2:

m - 14 = 51

Move negative fourteen(- 14) to the other side of the equation. Because we moved it, it is now positive fourteen( + 14)

m = 51 + 14

Combine like terms.

m = 65

Answer: Proportional

Step-by-step explanation: Any table that starts with (0,0), it means it’s proportional!

Answer: 21 water stations

Step-by-step explanation:

From the question, we are informed that a marathon is 26.2 miles long and that there is a water station every 1 1/4miles along the race route and at the finish line.

To get the number of water stations that are needed for this marathon, we divide 26.2 miles by 1 1/4miles. This will be:

= 26.2miles/1 1/4 miles

= 26.2 miles/1.25 miles

= 20.96

= 21 water stations

hope this helps you (⁠ ⁠´⁠◡⁠‿⁠ゝ⁠◡⁠`⁠)

Answer: 20%

Step-by-step explanation:

150,000 - 125,000 = 25,000

20 percent of 125,000 = 25k

Answer:

The answer is 7.5

The work done along path ABD is 8L. the work done along path ACD is 8M. the work done along path AD is 8N.  the work done varies depending on the path taken, we can conclude that the given force\(\vec{f} = 3\hat{i} + 5\hat{j}\)

To calculate the work done by a force along a path, we use the formula:

Work = ∫(F⃗ ⋅ dr⃗)

where F⃗ is the force vector, dr⃗ is the displacement vector along the path, and the dot product (⋅) represents the scalar dot product.

Given the force vector\(\vec{f} = 3\hat{i} + 5\hat{j}\) (in newtons), we can proceed to calculate the work done along each path:

Part A: Path ABD

In this path, the displacement vector dr⃗ is along the line segment AB and has a magnitude of |dr⃗| = AB. Let's assume AB has a length of L.

Since the force f⃗ is constant and in the same direction as the displacement, the dot product f⃗ ⋅ dr⃗ simplifies to |f⃗| ⋅ |dr⃗| ⋅ cos(0°) = |f⃗| ⋅ |dr⃗| = |f⃗| ⋅ L.

Therefore, the work done along path ABD is:

Work_ABD =\(|{\vec{f}}| \cdot L = (3\hat{i} + 5\hat{j}) \cdot L = 3L + 5L = 8L\)

Part B: Path ACD

In this path, the displacement vector dr⃗ is along the line segment AC and has a magnitude of |dr⃗| = AC.

Let's assume AC has a length of M.

Similar to Part A, since the force f⃗ is constant and in the same direction as the displacement, the dot product f⃗ ⋅ dr⃗ simplifies to |f⃗| ⋅ |dr⃗| ⋅ cos(0°) = |f⃗| ⋅ |dr⃗| = |f⃗| ⋅ M.

Therefore, the work done along path ACD is:

Work_ACD = \(|{\vec{f}}| \cdot M = (3\hat{i} + 5\hat{j}) \cdot M = 3M + 5M = 8M\)

Part C: Path AD

In this path, the displacement vector dr⃗ is along the line segment AD and has a magnitude of |dr⃗| = AD. Let's assume AD has a length of N.

Similarly, the dot product f⃗ ⋅ dr⃗ simplifies to |f⃗| ⋅ |dr⃗| ⋅ cos(0°) = |f⃗| ⋅ |dr⃗| = |f⃗| ⋅ N.

Therefore, the work done along path AD is:

Work_AD = \(|{\vec{f}}| \cdot N = (3\hat{i} + 5\hat{j}) \cdot N = 3N + 5N = 8N\)

Part D: Is this a conservative force?

A force is considered conservative if the work done by the force is independent of the path taken. In other words, the work done by a conservative force only depends on the initial and final positions of the particle.

In this case, the work done along paths ABD, ACD, and AD all depend on the lengths L, M, and N, respectively. Since the work done varies depending on the path taken, we can conclude that the given force\(\vec{f} = 3\hat{i} + 5\hat{j}\)

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You can tell if you solve the equation and get a variable equal to a number.

What is linear equation ?

A linear equation is an algebraic equation of the form y = mx+b. involving only a constant and a first-order (linear) term, where m is the slope and b is the y-intercept. Occasionally, the above is called a "linear equation of two variables," where y and x are the variables.

To find that  a solution is all real numbers or no solution,

Combine like terms on both sides of the equation. Isolate the x term by subtracting x from both sides. You arrive at the true statement “3 = 3”. When you end up with a true statement like this, it means that the solution to the equation is “all real numbers”.

You can tell if you solve the equation and get a variable equal to a number.

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Answer:

y= -3/1x-3

Step-by-step explanation:

its the right answer

Answer:

Step-by-step explanation:

Straight line equation is in the form of:

Lets verify the options:

Answer:    x≥7    

Step-by-step explanation:

Answer:

4/10 or 2/5

Step-by-step explanation:

it's simple, we add the fractions 3/10 and 1/10

since the denominators are the same we only add the top parts and leave the bottom alone.

so 3 + 1 = 4

    10  10  10

data:

radius=1.3 in

height=4.8 in

aluminum

Answer:

$0.56 per pound

Step-by-step explanation:

1.68/3

Hopefully, this helped :)

Answer:

$0.56 per pound

Step-by-step explanation:

\( \frac{1.68}{3} = 0.56\)

Answer:

x^3+11x

Step-by-step explanation:

((4^2+1)+(x^2-5))(x)

(16x+x^3-5x)

x^3+11x

The data states that a brisk walk is between 100 and 130 steps per minute, a mοderate walk is between 70 and 100 steps per minute, and a leisurely walk is between 50 and 70 steps per minute.

When sοmething is described as minute, it is exceedingly small. It οnly takes a tiny bit. Synοnyms: miniature, small, little, and small οther wοrds fοr minute.

The number οf steps a persοn takes each minute might change depending οn their age, gender, level οf fitness, and οther factοrs. Yet the fοllοwing serves as a basic rule fοr walking rates:

100–130 steps per minute fοr a brisk walk.

70 tο 100 steps per minute during a brisk walk.

50–70 steps per minute during a relaxed strοll

It's impοrtant tο keep in mind that all these rates are οnly suggestiοns, and that peοple may walk at different rates. Alsο, sοme pedοmeters and fitness trackers may calculate steps differently, making it pοssible that the step cοunts are nοt tοtally accurate.

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What is the walking rate in steps per minute in a brisk walk according to Walking cadence?

Answer: soo if the bill is $38

then 15% times 100 = 0.15

38.00 x 0.15 = $5.7

Step-by-step explanation:

Answer:

$5.7 as a tip

Answer:

the value of x is 8.

Step-by-step explanation:

\(x {}^{2} = 64\)

\(or \: x = \sqrt{64} \)

therefore x=8

is the answer...

Answer:

x=8

Step-by-step explanation:

\(8^{2} =64\)

8·8·8·8·8·8·8·8=64

hope this helps

good luck!!

Answer:

Step-by-step explanation:

You can also do this without 3 variables if you find it easier:

1st part:  x

2nd part:  3x

3rd part: 9x

9x + 3x + x = 39

13x = 39  combine like terms

x = 3  divide by 13.

Plug in value of x to find other two parts

The sum of two rational numbers is rational because the sum of any two fractions with rational numerators and denominators can be expressed as a fraction with a rational numerator and denominator.

A rational number is any number that can be expressed as a ratio of two integers, where the denominator is not equal to zero. For example, 1/2, -3/4, 6/5, and 0 are all rational numbers.

When we add two rational numbers together, we can use the following formula:

a/b + c/d = (ad + bc) / bd

where a, b, c, and d are integers and b and d are not equal to zero.

This formula tells us that the sum of two rational numbers is also a rational number. The numerator of the sum is found by cross-multiplying the fractions, and the denominator of the sum is found by multiplying the denominators.

For example, if we want to add 1/2 and 2/3 together, we can use the formula above:

1/2 + 2/3 = (1 x 3 + 2 x 2) / (2 x 3) = 7/6

Therefore, the sum of 1/2 and 2/3 is 7/6, which is also a rational number. This formula can be used to prove that the sum of any two rational numbers is also a rational number.

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A rational number is a number that can be written as \(\dfrac{a}{b}\) where \(a,b\in\mathbb{Z}\) and \(b\not=0\).

If one number is \(\dfrac{a}{b}\) and the other is \(\dfrac{c}{d}\), where \(b,d\not=0\), their sum is \(\dfrac{a}{b}+\dfrac{c}{d}=\dfrac{ad+bc}{bd}\). Since the set of integers is closed under addition and multiplication, we can write that \(\dfrac{ad+bc}{bd}=\dfrac{e}{f}\) where \(e,f\in\mathbb{Z}\) and \(f\not=0\), thus proving the sum of two rational numbers is a rational number.

The range of the data set is, 28

Subtraction in mathematics means that is taking something away from a group or number of objects. When you subtract, what is left in the group becomes less.

Given that;

The data set is,

74, 64, 90, 74, 92, 68, 71

Now, We know that;

Range of data set is calculating by subtracting the lowest value from highest value.

Hence, The range is,

⇒ Highest value - Lowest value

⇒ 92 - 64

⇒ 28

Thus, The value of range = 28

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To ensure the best test results, Anita should be provided with the following information before her spirometry:

1. Instructions for taking the test: Anita should be thoroughly explained about how the spirometry test works and what steps she needs to follow. This includes taking a deep breath and blowing as hard as she can into the spirometer mouthpiece. It is important to emphasize that she needs to repeat this procedure a few times and take deep breaths between each exhale.

2. Emphasize the importance of taking medication as prescribed: Anita should be reminded of the importance of taking her medications as prescribed, including on the day of the test. It is crucial for her to bring her medications to the test appointment.

3. Avoid certain foods and drinks: Anita should be informed to avoid consuming certain substances before the spirometry test, such as caffeine, alcohol, and heavy meals. These can potentially affect the accuracy of the test results.

4. Arrive early for the test: Anita should be advised to arrive early for the test to allow herself sufficient time to relax and calm down before the procedure. This can help ensure more accurate results.

The rationale behind providing these instructions and information is that spirometry is a lung function test that measures the amount and speed of air being breathed in and out. By following the instructions and guidelines, Anita can achieve optimal results, aiding in the diagnosis and assessment of lung conditions.

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Answer: 21/5

Step-by-step explanation:

I'm not sure if you wrote it right or not but

if DE = 4x-1 = 9x - 22

5x=21, x = 21/5

a) The average cost of the promotion is $ 0.01 per liter

b) the probability that Greer will refund more than $25 for a liter is 0.0107.

a.

Mean lifetime mileage : $33,500

Standard deviation of mileage: $3500

Observed miles: 30,000 miles

100 miles failed $1.00

Hence :

= (33,500 – 30,000) / 3500= 1

Cost of production

100 miles = $1.00

= 1* 1 / 100

= $ 0.01 per tire

b.

P (z < 25000 - 36500/5000)

P (z < -11500/5000)

z < -2.3

Hence:

1 - 0.9893

= 0.0107

Therefore, the Probability that gear will refund more than $50.00 per tire is: 0.0107

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Answer: 2.8%

Step-by-step explanation: 1/6 * 1.6 = 1/36   1/36 = 0.0277 = 2.8%

Answer:

y = 2/5x + 1

Step-by-step explanation:

If two lines are parallel, their slopes are equal

so the slope would be 2/5

if y = -7, x = -20, m = 2/5

slope-intercept form:

y = mx + b

-7 = 2/5(-20) + b

-7 = -8 + b

b = 1

then y = 2/5x + 1