The radius of circle a is 9 times greater than the radius of circle b. which of the following statements is true? a. the area of circle b is 9 times greater than the area of circle a. b. the area of circle a is 9 times greater than the area of circle b. c. the area of circle b is 81 times greater than the area of circle a. d. the area of circle a is 81 times greater than the area of circle b.

The area of circle A is 81 times greater than the area of circle B.

Since the formula is a = pi * r^2 the radius is being squared and the radius of circle a is 9 times grater it will be squared to 81 making the area 81 times bigger.

So D is your answer.

:)))

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.