A rectangular prism is a 3-dimensional shape; height, width, length. These three variables, when multiplied, will produce a volume for a rectangular prism. We are given everything we need but the height.
Given:
Volume, V = 80 in3
Length, L = 8in
Width, W = 5in.
Height, H = H in
8 inches * 5 inches * H inches = 80 inches3
40 inches2 * H inches = 80 inches 3
(divide each side by 40 inches2)
H inches = 2 inches.
The rectangular prism is 2 inches tall.