8. As shown in the figure below, a silo consists of a right cylinder with a half sphere on top.
The radius of the cylinder and sphere is 10 feet, and the height of the cylinder is 25 feet.
Which of the following is closest to the volume, in cubic feet, of the silo?
SHOW ALL WORK!
A. 2,200 ft
3
B. 8,900 ft³
3
C. 9,900 ft³
3
D. 21,700 ft
3
E. 52,400 ft³