Question: Math 180 Final Exam DO NOT WRITE ABOVE THIS LINE! Page 9 of 12 9. (15 points) A rectangular region is to be enclosed on

Math 180 Final Exam DO NOT WRITE ABOVE THIS LINE! Page 9 of 12 9. (15 points) A rectangular region is to be enclosed on three sides by a fence, and on the fourth side by a straight river. The enclosed area is to equal 3200 square feet. The cost of the fence is $2 per ft. Find the dimensions that minimize the cost of the fence. Be sure to explain why your answer minimizes cost

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