Khila and Melany are taking a walk after school. Khila gets a one-minute head start because she got out of class early. Khila walks 100 yards in a minute and Melany walks 150 yards in a minute.

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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the answer to your question is b.