If Colleen Mooney invests $ 7,415.15 now and she will receive $ 16,700 at the end of 12 years, what annual rate of interest will Colleen earn on her investment? (Hint:Use Table 3.) (Round answer to 0 decimal places, e.g. 25%.)

Tim Howard has been offered the opportunity of investing $ 32,729 now. The investment will earn 5% per year and at the end of that time will return Tim $64,800.

How many years must Tim wait to receive $ 64,800? (Hint: Use Table 3.) (Round answer to 0 decimal places, e.g. 25.)