A water line is to be built from point P to point S and must pass through
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A water line is to be built from point P to point S and must pass through regions where construction costs differ (see figure). The cost per kilometer (in dollars) is 3k from P to Q, 2k from Q to R, and k from R to S. Find x and y such that the total cost C will be minimized.
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2 km 1 km P Q y R 10 km S
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The distance from P to Q is x 4 The distance from Q to R is y x 1 The ...View the full answer
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