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7 January, 17:37

You need to accumulate $10,000. To do so, you plan to make deposits of $1,250 per year, with the first payment being made a year from today, in a bank account that pays 12 percent interest, compounded annually. Your last deposit will be less than $1,250 if less is needed to round out to $10,000. How many years will it take you to reach your $10,000 goal, and how large will the last deposit be?

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  1. 7 January, 17:43
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    It take you 6 years. The Last deposit will be 34,58

    Explanation:

    To get how many years will take to accumulate $10000. First we have to capitalize the different deposits.

    For example,

    First deposit will be $1,250

    At the end of this year we will have $1,400. We use formula of interest

    A=P (1+r) ⁿ

    A=Final amount

    P = Principal (deposit)

    r = interest rate

    n = time

    A=1250 (1+0,12) ¹=1400

    Year 2, we will deposit $1,250 and we have accumulated $1,400

    So, P will be $1250 + $1400=$2650

    A=2650 (1+0,12) ¹=$2.968

    Year 3 = deposit 1250 + accumulated 2.968

    A = 4.724,16

    Year 4 = deposit 1250 + accumulated 4.724,16

    A = 6.691,06

    Year 5 = deposit 1250 + accumulated 6.691,06

    A = 8.893,99

    We are close to our goal so now we have to do another calculus

    Year 6 = A Final = 10000 = (deposit + accumulated) * 1,12

    Our unknown here is the deposit

    So, deposit = (10000/1,12) - 8.893,99

    Last deposit = 34,58
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