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28 January, 00:48

On your ninth birthday, you received $300 which you invested at 4.5 percent interest, compounded annually. your investment is now worth $756. how old are you today?

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  1. 28 January, 02:10
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    300 (1+0.045) ^n = 756

    1.045^n = 756/300 = 2.52

    n = 21 year

    Your age = 9+21 = 30
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