Question

The area of circle A is 9 times greater than the area of circle B. If
the radius of circle B is 4 meters, what is the radius of circle A?
OA) 9 meters
OB) 12 meters
OC) 24 meters
OD) 36 meters

Answer 1

The answer is B.

If your radius is 4 then you do 4^2 times pi

Multiply that answer by 9 to get the area of circle A

Put the area into the formula

$\sqrt[]{A/\pi }$