Question

Answer the question below

Answer 1

- 9/10 per second

Explanation:

you fix the fractions and - means going under sea level so tus is - 9/10

Answer 2

-1/4 ft per second.

Explanation:

If she is 18 feet below sea level and 8 seconds later she is 20 feet, she has descended 2 feet per 8 seconds.

As we need to find feet per second, we must do 2/8 because we only have the feet per 8 seconds.

So
`(2)/(8)` feet =
`(8)/(8)` seconds:

2 feet / 8 seconds= 1/4 ft per second.

Therefore, she would have descended 1 feet per 4 second.

The question is asking for elevation, but this is a depression so it would be -1/4 ft per second.