*  Reading Outline, Sec4.4 *
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* Vocabulary/Definitions *
 - Fixed costs
 - Economy of scale
 - Revenue
 - Profit, as a function of revenue and cost
 - Marginal cost and marginal revenue, as average rates of change
 - Marginal cost and marginal revenue, as derivatives
 - Why maximum profit occurs when MR = MC



* Understand *
1. If the revenue of a business, R as a function of the quantity of items
produced, q, is R(q) = 7.31 q, what is the marginal revenue?


2. Suppose that the cost and revenue functions for a business are 
C(q) = 2.5 q^3 + 2 and R(q) = 15 q.  At what value of q, the
quantity of items produced, is the profit maximized?