Question

The resale value of a text book decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x hours

Answer 1

the answer is 85\cdot({3\over4})^{x}.

Explanation:

Answer 2

I assume you meant to say x sales, so I will give this a go:

It starts off at $85 dollars, and with each sale the value multiples by 3/4.

So the answer is
`85\cdot({3\over4})^(x)`.