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Unformatted text preview: the fruits of all of our labor in this section thus far. Example 2.3.3. The profit function for a product is defined by the equation Profit = Revenue − Cost, or P (x) = R(x) − C (x). Recall from Example 2.1.7 that the weekly revenue, in dollars, made by selling x PortaBoy Game Systems is given by R(x) = −1.5x2 + 250x. The cost, in dollars, to produce x PortaBoy Game Systems is given in Example 2.1.5 as C (x) = 80x + 150, x ≥ 0. 1. Determine the weekly profit function, P (x). 2. Graph y = P (x). Include the x- and y -intercepts as well as the vertex and axis of symmetry. 3. Interpret the zeros of P . 4. Interpret the vertex of the graph of y = P (x). 5. Recall the weekly price-demand equation for PortaBoys is: p(x) = −1.5x + 250, where p(x) is the price per PortaBoy, in dollars, and x is the weekly sales. What should the price per system be in order to maximize profit? Solution. 1. To find the profit function P (x), we subtract P (x) = R(x) − C (x) = −1.5x2 + 250x − (80x + 150) = −1.5x2 + 170x − 150. 2. To find the x-in...
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This note was uploaded on 05/03/2013 for the course MATH Algebra taught by Professor Wong during the Fall '13 term at Chicago Academy High School.

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