Question

A laptop computer is purchased for $1500 . each year, its value is 80% of its value the year before. after how many years will the laptop computer be worth $400 or less? (use the calculator provided if necessary.)

Answer 1

first year: 1500$

2- 1200$

3- 960$

4- 768$

5- 614.4$

6- 491.52$

7- 393.22$

the answer is seventh year