math
posted by Anonymous on .
LPG (liquefied petroleum gas) is stored in highly insulated spherical vessels in most oil refineries. if the inside of one of these tanks is 11.4 ft, find the volume. report your answer to the nearest onetenth of gal. use pie equal 3.14, and 1 cubic ft equal 7.5

Is the "inside" the radius or the diameter?
"1 cubic ft equal 7.5" what?
V =4/3πr^3