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3 years ago

14. 7 points and brainliest answer if you get it right

Mathematics

1 answer:

prohojiy [21]3 years ago

6 0

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The heights of women aged 20 to 29 are approximately Normal with mean 64 inches and standard deviation 2.7 inches. Men the same

masha68 [24]

Answer: The z-scores for a woman 6 feet tall is 2.96 and the z-scores for a a man 5'10" tall is 0.25.

Step-by-step explanation:

Let x and y area the random variable that represents the heights of women and men.

Given : The heights of women aged 20 to 29 are approximately Normal with mean 64 inches and standard deviation 2.7 inches.

i.e. $\mu_1 = 64$ $\sigma_1=2.7$

Since , $z=\dfrac{x-\mu}{\sigma}$

Then, z-score corresponds to a woman 6 feet tall (i.e. x=72 inches).

[∵ 1 foot = 12 inches , 6 feet = 6(12)=72 inches]

$z=\dfrac{72-64}{2.7}=2.96296296\approx2.96$

Men the same age have mean height 69.3 inches with standard deviation 2.8 inches.

i.e. $\mu_2 = 69.3$ $\sigma_2=2.8$

Then, z-score corresponds to a man 5'10" tall (i.e. y =70 inches).

[∵ 1 foot = 12 inches , 5 feet 10 inches= 5(12)+10=70 inches]

$z=\dfrac{70-69.3}{2.8}=0.25$

∴ The z-scores for a woman 6 feet tall is 2.96 and the z-scores for a a man 5'10" tall is 0.25.

6 0

3 years ago

Pls help :( I’m so stuck in this

hodyreva [135]

Answer:

99.6 ft²

Step-by-step explanation:

Three faces are equal triangles with:

base = 8 units, height = 6 ft

The base is a triangle with:

base = 8 ft, height = 6.9 ft

Surface area is sum of areas of 4 faces:

S = 3*(1/2*8*6) + 1/2*8*6.9 = 99.6 ft²

8 0

2 years ago

Read 2 more answers

I will give BRAINLIEST to whoever is CORRECT

8090 [49]

I believe the answer could be

h = -16t^2 + 32t + 12
---------------------------
t

7 0

3 years ago

1. 14=7b 2. -11=k/4 3.6z=-6

Romashka-Z-Leto [24]

Answer:

the anwer is 14-2294-dhi2

Step-by-step explanation:

Because 14 is - 4 you multiple to 5 equal= dhi2

3 0

1 year ago

GIVING 100 POINTS FOR THE FIRST CORRECT ANSWER

Wittaler [7]

Mrs. Walters gets 14.4 miles per gallon.
Mr. Walters gets 15 miles per gallon.
So Mr. Walters car is better because he gets more miles out of one gallon of gas.
360/25=14.4 480/32=15
Stephen can read 90 pages in 6 days witch means he reads 15 pages per day. Which means it will take him 20 days to read a 300 page book.

90/6=15 300/15=20

4 0

2 years ago