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Math Help - Rationalize and solve.

  1. #1
    Newbie firefly_senshi6's Avatar
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    Rationalize and solve.

    I have some math work to turn in tonight and one of the problems just isn't making sense to me. If someone could lend me a hand, it would be much appreciated.

    Oh, and since the LaTex isn't working right now, I used Paint to make a picture of the problem that I'm having trouble with. It's all I could think of to do.

    "If an investment of P dollars grows to A dollars in 2 yr, the annual rate of return on the investment is given by:

    Rationalize the denominator. Then find the annual rate of return r (as a percent) if $50,000 increases to $58,320."
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  2. #2
    Super Member

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    Hello, firefly_senshi6!

    If an investment of P dollars grows to A dollars in 2 years,
    the annual rate of return on the investment is given by:



    Rationalize the denominator.
    Then find the annual rate of return r (as a percent) if $50,000 increases to $58,320.
    . . . . . . . . . . . . . . . . . . . . _
    Multiply top and bottom by √P
    . . . . . . . . _ . . ._ . . ._ . . . . . __
    . . . . . . . √A - √P . .√P . . . . √AP - P
    . . r . = . ----------- . --- . = . -----------
    . . . . . . . . .√P . . . √P . . . . . . . P


    If A = 58,320 and P = 50,000, then:
    . . . . . . . . ______________
    . . . . . . . √(58,320)(50,000) - 50,000
    . . r . = . ---------------------------------- . = . 0.08 . = . 8%
    . . . . . . . . . . . . . 50,000


    When is LaTeX returning ??
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  3. #3
    Newbie firefly_senshi6's Avatar
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    Ohhh, I get it now. Thank you SO much!!
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