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Unformatted text preview: 4) The cost in millions of dollars for a company to manufacture x thousand automobiles is given by the function C(x) = 5x 2-40x + 144. Find the number of automobiles that must be produced to minimize the cost. 5) An object is propelled vertically upward from the top of a 96-foot building. The quadratic function s(t) = -16t 2 + 160t + 96 models the ball's height above the ground, s(t), in feet, t seconds after it was thrown. After how many seconds does the object reach its maximum height? Round to the nearest tenth of a second if necessary. 6) The total profit function P(x) for a company producing x thousand units is given by P(x) = -2x 2 + 26x-80. Find the values of x for which the company makes a profit. [Hint: The company makes a profit when P(x) > 0.] 1...
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- Spring '08