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Unformatted text preview: F. y ′ = 2  x  = − 2 x iF x ≤ 2 x iF x > 4 4 . A 1125 ft 3 opentop rectangular tank with a square base x ft on a side and y ft deep is to be built with its top Fush with the ground to catch freshmen. The costs associated with the tank invlove not only the material from which the tank is made but also an excavation charge proportional to the product xy . If the total cost is c = 5( x 2 + 4 xy ) + 10 xy what values of x and y will minimize it? 5...
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 Spring '07
 Osserman
 Math, Calculus, Derivative, 30 Minutes, 2007 Sec

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