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if a car is 61,400 and lose 20% each year. How many years will it take for the value to reach 5,000

Guest Mar 10, 2017
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 #1
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5000 = 61400 (.80)^x

5000/61400 = .8^x

 

log (5000/61400) = x log(.8)

x =  log(5000/61400)/log(.8) = 11.24 years

ElectricPavlov  Mar 10, 2017
edited by ElectricPavlov  Mar 10, 2017
 #2
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y=61,400*(1.00-.2)put in years and guess and check

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Guest Mar 10, 2017

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