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Math Help - marginal cost/revenue to total cost / revenue

  1. #1
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    marginal cost/revenue to total cost / revenue

    MR(Q) = 75 - Q^2
    MC(Q) = 9+ 3Q^2
    Fixed cost equals 10
    Output is 10 units
    I need to find TC and TR
    i know i need to integrate but thats as far as i get.

    integrating gives 75Q - 1/3Q^3+ c and 9Q + Q^3 + c
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  2. #2
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    Quote Originally Posted by molimoli View Post
    MR(Q) = 75 - Q^2
    MC(Q) = 9+ 3Q^2
    Fixed cost equals 10
    Output is 10 units
    I need to find TC and TR
    i know i need to integrate but thats as far as i get.

    integrating gives 75Q - 1/3Q^3+ c and 9Q + Q^3 + c
    The first "c" is "fixed" cost- the cost that will be incurred no matter how many are produced. Knowing the marginal cost (the cost of "one more") will not tell you that.
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