How do I solve this? without logarithm
A fully loaded Toyota Forerunner sells for $42,000. It depreciates 12% per year from the date of
purchase. How many years will it take to be worth half its value?
I think part of the equation is 42,000(.88)^x
idk what it means for half, half of 42,000 is 21000
how would I solve this without a calculator, I forgot how to...