If a normal distribution has a mean of 44 and a standard deviation of 8, what is the z-score for a value of 54?
O A. 1.25
O B. 0.75
O c. 1.75
D. 0.25
SUBMIT

We're looking for z such that 54 is equal to some multiple of the standard deviation, 8z, plus the given mean.

54 = 8z + 44

Solve for z :

z = (54 - 44)/8 = 10/8 = 5/4 = 1.25

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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