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30 April, 03:05

Your mom opened a college fund for you when you were born. The fund had an annual interest rate of 2.5%. When you turned 18, the account had earned $4,275 in interest. What was the amount your mom deposited when you were born? Use the formula: I = Prt.

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  1. 30 April, 03:16
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    Given:

    Interest = 4,275

    interest rate = 2.5%

    term = 18 years

    Principal = ?

    Interest = Principal * interest rate * term

    4,275 = P * 2.5% * 18

    4,275 / (2.5% * 18) = P

    4,275 / 0.45 = P

    9,500 = P

    Your mom deposited 9,500 when you were born.
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