Question

Suppose that a phone that originally sold for $800, loses a fraction of its value each year after it is released. An equation to represent the value, v of the phone, t years after it is released is V equals 800 (2/5)x. what is the value of the phone after five years?

Answer 1

320

Explanation:

cross multiply 800 and 5 cancel out to 160. then divide 160 by 2x and get 320.