Question

A submarine descends -3.5 meters per minute. How far will the submarine descend in 8 minutes?

How do you know your answer will be negative?

Answer 1

28

Explanation:

-3.5*8

Answer 2

-28 meters

Explanation:

The speed of the submarine = (-3.5) per minute

Since it's descending, we know the answer will be negative.

The distance covered by the submarine is 8 minutes = (-3.5) x 8 = -28 meters.