The total revenue curve of a firm is R(x) = 32·5x – 12x2 and its average cost A(x) =  x²  – 13x + 20 + 200; where x is the firm’s output.                                    30                          x (a). Derive an expression, Π (x),  for the firm’s profit function.           [Hint: Average Cost = Total Cost                                                 quantity              (Average cost)(quantity) = Total Cost        Or        Total Cost = (Average cost)(quantity);        where, in this case, quantity is output level, x]. (b). Is the rate of change of profit increasing or decreasing         when the output level of the firm is x = 10 and x = 30? (c). Determine the level of output for which profit is maximized.

Managerial Economics: Applications, Strategies and Tactics (MindTap Course List)
14th Edition
ISBN:9781305506381
Author:James R. McGuigan, R. Charles Moyer, Frederick H.deB. Harris
Publisher:James R. McGuigan, R. Charles Moyer, Frederick H.deB. Harris
ChapterB: Differential Calculus Techniques In Management
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The total revenue curve of a firm is R(x) = 32·5x – 12xand its
average cost A(x) =  x²  – 13x + 20 + 200; where x is the firm’s output.   
                                30                          x

(a). Derive an expression, Π (x),  for the firm’s profit function.   

       [Hint: Average Cost = Total Cost  
                                              quantity      

       (Average cost)(quantity) = Total Cost
       Or

       Total Cost = (Average cost)(quantity);
       where, in this case, quantity is output level, x].

(b). Is the rate of change of profit increasing or decreasing
        when the output level of the firm is x = 10 and x = 30?

(c). Determine the level of output for which profit is maximized.

(d). What is the maximum profit.

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