A fish tank is shaped like a rectangular prism. The area of the base of the fish tank is 6 1/8 square feet. The height of the fish tank is 3 1/2 feet.

Volume of fish tank = 21 7/16 or 21.4375 cubic feet.

Explanation:

Given the following data;

Base area of tank = 6 1/8 square feet

Height of tank = 3 1/2 feet

Required:

To find the volume of the rectangular prism (fish tank);

Volume of rectangular prism = base area * height

Substituting into the formula, we have;

Volume of fish tank = 6 1/8 * 3 1/2

Volume of fish tank = 49/8 * 7/2

Volume of fish tank = 343/16

Volume of fish tank = 21 7/16 or 21.4375 cubic feet.