The formula is: V = π(r^2)h/3 Since this problem gives you the diameter and not the radius, I would take half of the diameter because a radius is half of a diameter. The half of 8 is 4, so the radius is 4 V = π(4^2)(9/3) V = π(4^2)(3) V = π(16)(3) V is about 150.8
