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Suppose you invest $100 at a compound interest rate of 10%. The rule of 72 tells you that your money will double every seven years, approximately: If you graph these points, you start to see the familiar compound interest curve:
The first $600 investment will be made at the end of this year.. Using a financial calculator, enter N = 10, I/Y= 10, and PMT = -600; compute FV = 9,562.45. If you invest $600 per year for the next 10 years, how much will your investment be worth at the end of 10 years if your.