Question

I need it fast! 10 points!

A rectangular prism has a length of 8 in., a width of 4 in., and a height of 2 1/4 in. The prism is filled with cubes that have edge lengths of 1/4 in. How many cubes are needed to fill the rectangular prism?

Answer 1

volume of large prism: 8 x 4 x 2 1/4 = 72 cubic inches

volume of small prism: 1/4 ^3 = 0.15625 cubic inches

72 / 0.15625 = 4,608 cubes