Shown below are the steps a student took to solve the simple interest formula A = P(1 + rt) for r.

Question

Shown below are the steps a student took to solve the simple interest formula A = P(1 + rt) for r.

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    0
    2021-09-04T14:08:52+00:00

    To solve A = P(1 + rt) for r, first isolate (1 +rt) by dividing both sides of this equation by P:

    A/P =  1 + rt.

    Next, isolate rt by subtracting 1 from both sides:

    A/P – 1 = rt

    Finally, divide both sides by t:

    A/P – 1

    ———– = r

        t

    This could be written in other formats, such as:

    A – P

    ——– = r

    Pt

    0
    2021-09-04T14:09:16+00:00

    Answer:

    The student did not distribute properly to get A= P+Prt.

    The equation can be fixed by putting a factor of P in the denominator: r=(A-P)/Pt

    Step-by-step explanation:

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