A parachutist's elevation changes by -90 ft in 9 seconds. What is the change in the parachutist's elevation each second?

Divide total distance by total time:

-90 /9 = -10

-10 feet per second

The change in the Parachutists elevation each second is 10ft

Step-by-step explanation:

If you divide the elevation -90ft by 9 seconds you will get the feet per second. (-90/9) Hope this helps :D

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

step-by-step explanation:

divide, then simplify your answer.

1. make -15.66 ÷   5.8 a fraction. then divide.

2. simplify.  

3. final answer.