in a class of 32 students ,the mean height of the 14 boys is 1.56m , the mean height of all 32 student is 1.515m , work out the mean height if girls

i dont understand the question? ?

step-by-step explanation:

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step-by-step explanation:

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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