Question

A scuba diver descends 20.5 feet per minute towards the ocean floor for 4 minutes and then ascends 15 1/3 feet per minute towards the water’s surface for 2 minutes.

What is the total change in the diver’s depth?

The total change in the scuba diver’s depth is _ feet.

Answer 1

-51 1/3 ft

Explanation:

First, he descends:

-20.5 ft/min × 4 min = -82 ft

Then he ascends:

-82 ft + 15 1/3 ft/min × 2 min =

= -82 ft + 30 2/3 ft

= -51 1/3 ft