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Question: question 7 10 points a 120inch strip of metal 12...

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Question 7 (10 points) A 120-inch strip of metal 12 inches wide is to be made into a small open trough by bending up two sides on the long side, at right angles to the base. The sides will be the same height, x. If the trough is to have a maximum volume, how many inches should be turned up on each side? (10 points)
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