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Math Help - Help with Midterm Review for Test

  1. #1
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    Help with Midterm Review for Test

    Please help with this calculus Mid-term review question. I have 12 more of these questions to go and I don't have a clue how to do this. I'm a beginner at calculus.

    For the given cost function C(x) = 54sqrt(x)+ x^2/421875

    a.) The cost at the production level 1450= My answer: $2061.242443
    b.) The average cost at the production level 1450= ?
    c.) The marginal cost at the production level 1450=?
    d.) The production level that will minimize the average cost=?
    e.) The minimal average cost=?
    Last edited by Michael111; April 30th 2013 at 04:32 PM.
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    Re: Help with Midterm Review for Test

    Quote Originally Posted by Michael111 View Post
    For the given cost function C(x) = 54sqrt(x)= x^2/421875
    This cost function is impossible. Either C(x) = 54 \sqrt{x} or C(x) = \frac{x^2}{421875}. It can't be both.

    -Dan
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    Re: Help with Midterm Review for Test

    Hello, thank you for your reply. C(x) = 54sqrt(x)+ x^2/421875
    Thanks from topsquark
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    Re: Help with Midterm Review for Test

    b.) 1.421546512
    c.) .7159288115
    d.) ?
    e.) ?


    Are those answers right? Anyone know how to do d.) and e.)?
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    Re: Help with Midterm Review for Test

    I am really stuck guys, any help?
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