A submarine was diving at 77.1 feet per minute. Which number represents the position of the submarine in relation to the surface after 8 minutes?

A. - 85.1 ft.

B. - 616.8 ft.

C. 716.8 ft.

D. 85.1 ft.

First, Multiply 77.1 by 8 to find how many feet the submarine has dived.

77.1 * 8 = 616.8

Since the question is asking the submarines position "in relation to the surface," this number needs to be negated.

616.8 ⇒ - 616.8

Answer:

The submarine is at - 616.80 ft in relation to the surface, so option B is correct.