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    A firm has the following total-cost and demand functions:

    C=1/3Q^3 - 7Q^2 + 111Q +50

    Q= 100-P

    a) Does the total-cost function satisfy the coefficient restrictions of (9.5 [a, c, d > 0 ; b<0 ; b^2<3ac])

    b) Write out the total-revenue function R in terms of Q

    c) Formulate the total-profit function (pie) in terms of Q

    d) Find the profit-maximizing level of output Q*

    e) What is maximum profit?

    Seeing as you haven't tried anything, I'm guessing you just want answers to hand in rather than help. Try googling it. The whole solution has been posted.
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Updated: November 6, 2017

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