Brief Exercise A-18 If Colleen Mooney invests $7,719.50 now and she will receive $18,500 at the end of 15 years, what annual rate of interest will Colleen earn on her investment? (Hint: Use Present value of 1 factor table.) (Round answer to 0 decimal places, e.g. 25%.) Click here to view the factor table. (For calculation purposes, use 5 decimal places as displayed in the factor table provided.) Annual rate of interest %