A car depreciates at a rate of 13% each year for the first 5 years after it is driven off of the lot. A recent high school graduate is looking to buy a car that is worth $23150.
Using logarithms, algebraically determine the number of years it will take the car to worth less than $15000.
Thank you for helping:)
+36915 value = 23150 * ( 1 - .013)n
15000 = 23150(.87)n
15000/23150 = .87n
log ( 15000/23150) = n log (.87) I think you can take it from here, no ? 
