An investment of $6800 is expected to pay $10,000 at an annual interest rate of 10%. How many years will it take to realize this return on the investment? You have inherited $30,000 from a wealthy relative and are trying to choose between two long term investments. One fund pays 4% and the other 6%. You would like to have the money available in 36 years, Using the Rule of 72 , how would you calculate the advantages of each investment