is anyone like really good at algebra 2 that can help me with some problems cause I'm mad confused and really need help please be serious i actually need help

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

: )

answer: i literally just answered this question but they want me to do it again

step-by-step explanation: