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Your savings account has doubled over the past 10.8 years. calculate the interest rate you have earned.thanks?

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  • ralph
    Lv 5
    1 decade ago
    Favorite Answer

    Use the rule of 72. 72 divided by interest rate equals the number of years to double your money. In this case.

    72 / i = 10.2 or i = 72 / 10.2 = 7.058 % interest.

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