Respuesta :
I added the formula as an attachment. The symbol is pi, which usually is shortened to just 3.14. The "r" is for the radius, and since you have a diameter divide that by 2 as the radius is only half. Plug these in and there's your answer; 4.189 or

Answer: A
why? because
V=4
3πr3=4
3·π·13≈4.18879
if we were to round this up to the nearest tenth it would be 4.2 feet square of 3