Question

A submarine located 75 feet below the surface of water begins to descend further at a rate of 8 feet per minute. The expression-75-8m represents the depth of submarine after each minute, m. Find the depth of the submarine after 5 minutes?

Answer 1

115 feet below surface

Explanation:

The starting depth of the submarine is 75 feet. Multiply 8ft.*5 to then get 40ft. Add 75ft to 40ft to get 115 ft.