SOLUTION: What is the largest area of land you can fence in if you have (8x+20) feet of fencing?

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Question 1134186: What is the largest area of land you can fence in if you have (8x+20) feet of fencing?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The largest area with a given perimeter is a circle.
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C = 8x+20 = 2pi*r
r = (4x+10)/pi
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Max area = pi*r^2
= %284x%2B10%29%5E2%2Fpi