Consider a rectangle in the xy-plane, with corners at (0, 0), (a, 0), (0, b), and (a,

Question:

Consider a rectangle in the xy-plane, with corners at (0, 0), (a, 0), (0, b), and (a, b). If (a, b) lies on the graph of the equation y = 30 - x, find a and b such that the area of the rectangle is maximized. What economic interpretations can be given to your answer if the equation y = 30 - x represents a demand curve and y is the price corresponding to the demand x?

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