Solution:
we have been asked to find
The expression is equivalent to 
we can simplify the given expression as below

Hence the simplified expression , equaivalent to the given expression is 1/2.
To solve this do:
838.35/9315= 0.09.
This means the company charged $.09 for every kilowatt of electricity used.
D and E are the ones that aren’t functions because they use the x-values more then once
Answer:
12,600 after 3 years with no withdrawals.