Anon-scale model of the earth has a diameter of 18 in. within an outer clay layer, there is a core made of a ball with a diameter of 3 in.
what is the volume of the clay?
use 3.14 to approximate pi. round to the nearest hundredth if necessary.

Using 3.14 as an estimate for pi, the answer is 3037.95 in. cubed. But if more digits of pi were used, the answer is 3039.49 in. cubed. I found the answer by using the sphere volume formula (4/3) on both sphere measurements, then subtracted the smaller core sphere from the rest of the sphere. The above named numbers were the result.