Engineering Economy 7th Edition by Leland Blank ,Anthony Tarquin

تمرين 16

An engineer who was contemplating retirement had $1.6 million in his investment portfolio. However, a severe recession caused his portfolio to decrease to only 55% of the original amount, so he kept working. If he was able to invest his money at a rate of return of 9% per year after the recession ended, how many years did it take for his account to get back to the $1.6 million value