Personal finance advisors sometimes use the "Rule of 72" to estimate how long it will take for an investment to double if it earns a certain percent per year. The Rule of 72 says that the amount of time for an investment to double, in years, can be estiimated by taking the number 72 and dividing by the percent it earns per year. For example, if an investment earns 2% per year, then it will take 272=36 years to double the investment. Suppose an investment earns 9% per year. It starts with $6200 in the account. Use this information to find the values of the missing cells in the table