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13 September, 23:05

Jane is borrowing money from her sister, who is charging her simple interest using the formula I = Prt. To figure out the interest rate r, Jane rearranges the formula. What is r in terms of I, P, and t?

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  1. 13 September, 23:27
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    I = Prt

    r in terms of I, P, and t:

    I = Prt

    Re-write

    Prt = I

    Divide both sides by Pt

    Prt / Pt = I/Pt

    Simplifying

    r = I/Pt
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