please use formulas

You expect to receive $9,000 from your godmother at graduation in two years. You plan to invest the gift in the Transylvanian Bank \& Loan which pays 11 percent annually on deposits. You'll leave your money in the bank until you have $103,000. How long will you have to wait from now before you reach that target amount? (Do not round your intermediate calculations.) 28.40 years 23.36 years 21.36 years 27.89 years 25.36 years