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Sliva [168]
2 years ago
12

Suppose the mean height for men is 70 inches with a standard deviation of 2 inches. What percentage of men are more than 72 inch

es tall?
Mathematics
1 answer:
hichkok12 [17]2 years ago
7 0

The percentage of men is more than 72 inches tall will be 0.15866.

<h3>What is the z-score?</h3>

The z-score is a statistical evaluation of a value's correlation to the mean of a collection of values, expressed in terms of standard deviation.

The z-score is given as

z = (x – μ) / σ

Where μ is the mean, σ is the standard deviation, and x is the sample.

Suppose the mean height for men is 70 inches, with a standard deviation of 2 inches.

Then the percentage of men are more than 72 inches tall will be

z = (72 – 70) / 2

z = 1

The percentage of men is more than 72 inches tall will be

P(x > 72) = P(z > 1)

P(x > 72) = 1 – P(x < 72)

P(x > 72) = 1 – 0.84134

P(x > 72) = 0.15866

Thun, the percentage of men are more than 72 inches tall will be 0.15866.

More about the z-score link is given below.

brainly.com/question/15016913

#SPJ1

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Consider the function f(x) = x2 + 3x − 7. Find the value of f(x) when x = 3 and select the correct answer below.
victus00 [196]

<em>Answer</em>

= 11

<em>Explanation</em>

f(x) = x² + 3x- 7

To get the value of f(x) when x = 3, we substitute x with 3 in the function f(x).

f(x) = x² + 3x- 7

= 3² + (3×3) -7

= 9 + 9 - 7

= 11

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3 years ago
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butalik [34]

The number of rotations for the new wheel will be  1,056 rotations

<h3>How to calculate the circumference of a wheel?</h3>

Let the initial circumference be 50 rotations  (assumed)

If the number of rotations of the circumference of the tires were increased by 20%, then the new circumference will be:

Ne circumference = 1.2 * 50 = 60

number of rotations for the new wheel = 63360/60
number of rotations for the new wheel = 1,056 rotations

Hence the number of rotations for the new wheel will be  1,056 rotations

Learn more on circumference here: brainly.com/question/20489969

7 0
2 years ago
A cake recipe calls for 4.5 deciliters of milk. How many liters of milk is needed for the recipe?
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What is the percentage… b of sugar in the syrup made of 10 kg of water and 4 kg of sugar?
Artist 52 [7]

Answer:

<h3>28 4/7 % ≈ 29%</h3>

Step-by-step explanation:

4 kg - weight of sugar

10 kg - mass of water

4kg + 10kg = 14kg - weight of the syrup

\dfrac{4kg}{14kg}=\dfrac{2}{7}

The sugar is 2/7 of the weight of the syrup.

Convert to the percentage:

\dfrac{2}{7}=\dfrac{2}{7}\cdot100\%=\dfrac{200}{7}\%=28\dfrac{4}{7}\%\aaprox29\%

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Answer:

It will take 11 minutes

Step-by-step explanation:

660 ÷ 60 = 11

Distance= rate×time

D=rt

660 (distance)= 60 (feet per minute or rate) × t (we have to find out the time it takes to get there.

We divide 660 by 60 to find the missing value, which is 11.

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3 years ago
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