SOLUTION: How to solve a depreciation problem. A car cost $20,000 new,depreciation formula is 20,000(0.8)^x x being time in years. How many years until car is worth half it's original

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Question 443143: How to solve a depreciation problem.
A car cost $20,000 new,depreciation formula is 20,000(0.8)^x
x being time in years. How many years until car is worth half it's original value
Answer by rwm(914) About Me  (Show Source):
You can put this solution on YOUR website!
10000=20,000(0.8)^x
1=2(0.8)^x
1/2=.8^x
3.1=x