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OpenStudy (anonymous):
A farmer is planning a rectangular area for her chickens. The area of the rectangle will be 800 feet. Three sides of the rectangle will be formed by fencing, which costs $5 per foot. The fourth side of the rectangle will be formed by a portion of the barn wall, which requires no fencing. In order to minimze the cost of the fencing, how long should the fourth side be? A.40ft B.20ft C.16ft D.50ft
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OpenStudy (ahsome):
This is quadratics, isn't it?
OpenStudy (anonymous):
Yes
OpenStudy (anonymous):
Well its geometry so I guess that fits right in there
OpenStudy (ahsome):
Thought so. Let two of the sides be \(x\) and the third side \(y\)
OpenStudy (anonymous):
so x^2-y ?
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