SOLUTION: A laptop is purchased for 4700. Each year, its value is 70% of its value the year before. After how many years will the laptop computer be worth 400 or less? write the smallest

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: A laptop is purchased for 4700. Each year, its value is 70% of its value the year before. After how many years will the laptop computer be worth 400 or less? write the smallest       Log On


   

Question 877530: A laptop is purchased for 4700. Each year, its value is 70% of its value the year before. After how many years will the laptop computer be worth 400 or less?
write the smallest possible whole number answer.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
0,4700
1,4700%280.7%29=3290
2,3290%280.7%29=2303
3,2303%280.7%29=1612
4,1612%280.7%29=1128
5,1128%280.7%29=790
6,790%280.7%29=553
7,553%280.7%29=387
.
.
.
After 7 years.