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11 December, 07:43

4. Heidi opens a savings account and deposits € 1,500. The bank pays interest on your credit 3.2%. At the end of the year, Heidi receives € 30 interest. When did she open the account? I just wanted to know how to do that.

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  1. 11 December, 09:34
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    0.625 years = 7.5 months

    Step-by-step explanation:

    Simple interest formula = rxtxp divided by 100

    R x T x P / 100 = 30

    Substitute all the values we know

    3.2 x T x 1500/100 = 30

    Simplify and rearrange =

    3.2 x T x 1500 = 3000

    3.2 x T = 2

    T = 2/3.2

    T = 0.625
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