Question

the resale value of a go-kart decreased by $20 for every hour it is used after how many hours does the value decreased by $400

Answer 1

In order to find after how many hours the value will decrease by $400, we just need to divide this value by the change per hour of $20, so we have:

$\frac{400}{20}=20$

So after 20 hours the value will decrease by $400.