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Math 211 Business Calculus Applications of Derivatives

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Another Fencing Problem<br />

The owner <strong>of</strong> a long building wishes to attach a<br />

rectangular fence as shown<br />

Building<br />

4$ y y 4$<br />

The sides that make up the width cost 4$ per foot<br />

The side that makes up the length costs 5$ per foot<br />

The area must be 810 square feet<br />

What dimensions minimize the cost<br />

x<br />

5$<br />

– p. 28/34

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