Question

a scuba diver descended at a rate of 2 1/4 per second. If 0 represents the surface of the water and distances below the surface are negative,which expression represents one way to calculate the location of the diver after 12 1/2 seconds?

Answer 1

The location will be at
`- 28(1)/(8)` units.

Explanation:

A scuba diver descended at a rate of
`2(1)/(4)` units per second.

Now, if 0 represents the surface of the water and distances below the surface are negative, then after
`12(1)/(2)` seconds the location of the diver will be given by the followings :

In one second the diver descends by 2.25 units depth.

So, in 12.5 seconds the diver will descend by
`(2.25 * 12.5) = 28.125` units i.e.
`28(1)/(8)` units depth.

Therefore, the location will be at
`- 28(1)/(8)` units. (Answer)