How long would it take to quadruple your money at an annual rate of 8 percent? 15 years 16 years 17 years 18 years 19 years 20 years QUESTION 7 You purchased a rare baseball card for $6,000 as an investment. Three years later you accidentally spilled coffee on it whille working on your finance homework, and were forced to sell it for $4,500. What rate of return did you earn? (Hint: it is negativel) 7.57% 9.14% 11.1% 8.85% 14.22 12.04%