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13 December, 08:09

How much would $100 invested at 6% interest compounded continuously be worth after 20years? round your answer to the nearrest cent

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  1. 13 December, 10:10
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    6% interest means 6% of the money in the account is added each year.

    With an initial value of $100, that means $6 is added after 1 year.

    It's easiest to just make an exponential function for this.

    The format of this is f (x) = a (b) ^x

    a is the y-intercept/starting value, which in this case is $100.

    b is the rate of change, which is 6% in this case.

    When something increases by a percent, you add 100% to that.

    This means there is a rate of change of 106%, which translates to 1.06 in the function.

    Plugging in the variables you get:

    f (x) = 100 (1.06) ^x

    x is time.

    After 1 year, x=1.

    After 2 years, x=2.

    And so on and so forth.

    To find the value of the account after 20 years, plug in 20 for x.

    f (x) = 100 (1.06) ^20

    First, you would solve 1.06^20, which equals about 3.20713547.

    Then just multiply that by 100.

    3.20713547 • 100 = 320.713547

    Last, you just need to round to the nearest cent.

    320.713547 - > 320.71

    So the answer is that the account is worth $320.71 after 20 years with a 6% interest rate.
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