I just followed the numbering list.
2) The volume of a cube is V = s^3 where s = side. So, V = 15^3 = 3375 cu. inches.
3) The volume of a prism is V = A*h where A = surface area and h = height. So, A = (120 sq.ft)(8 ft) = 960 cu. ft.
4) 1246 cu. cm (1 mL/1 cu.cm) = 1246 mL
5) volume
10) The volume of a cylinder is V = pi*h*(d/2)^2. So, V = 3.1416*4.5*(3/2)^2 = 32 cu. inches