Question

A diver is 35 ft below sea level. After he swims up 20ft what is his new position?​

Answer 1

The diver is swimming up, but the number is in terms of amount below sea level.

As the diver moves up, the distance between the surface of the sea and the diver shrinks.

This means we subtract the amount the diver moves from his previous situation.

35ft - 20ft = 15ft

The diver's new position is 15ft below sea level.

Answer 2

15 below sea level

Explanation:

So they are 35 below sea level so that's -35. They come up 20 so that's -35 + 20 which is -15