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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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This note was uploaded on 10/07/2008 for the course MATH 21A taught by Professor Osserman during the Spring '07 term at UC Davis.
 Spring '07
 Osserman
 Math

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