Name Doubling Your Money Date Period ( ExampLE ) Jean withdraws his 9% simple interest at the end of each year. He leaves the principal in savings so that it will continue to earn interest. How long will it take for him to earn as much interest as the amount he invested? Recall: To double your money with simple interest, divide 100 by the rate of interest. 11 years 9) 100 Jeanette does not withdraw her interest. That way it becomes compound interest. How long will it take for her investment to double? Recall: To double your money at com 72 by the rate of interest. 8 years 9) 72 Jean's money will double in 11 years. Jeanette pound interest, divide 's will double in 8. Directions Find how many years it will take to double these investments. Interest Years to Interest Years to Investor Rate |Compounding | Double jnvestor | Rate |Compounding | Double 1.|Joseph 4% Simple |25 11.| Kai 9% Simple E 4% Annual 12.| Mary 9.25% Simple Bm 8% Simple 13.|Susan 9.5% Simple E Giovanni 8% m 14.| Marta 9.75% Simple Bm 3.2% m 15.| Shu Lin 10% Simple u 3.2% m 16.| Joan 9% Annual M 5.4% m 17.| Juanita 9.2% Annual 8.|Ivan 5.4% m 18.| Jeanika 9.5% Annual 9. m 19.| Larue 9.75% Annual 10.|Juan 7.6% Simple 20.| Marsha 10% Annual