calculus
posted by barb .
find the area of each circle. use 22 over 7 for pie. and radis for 15 in.

The area of a circle of radius r is given by
area = πr²
So if
radius = 12 inches, then
Area = (22/7)*12² square inches
= (22/7)*144 square inches
= 453 square inches.
Can you try calculating with r=15 inches?