document.write( "Question 1021476: Suppose you have 80 feet of fence to enclose a rectangular garden. the Function A=40x-x^2 gives you the area of the garden in the square feet where x is the width in feet.\r
\n" ); document.write( "\n" ); document.write( "A. What is the maximum area?
\n" ); document.write( "B. What width will yield the maximum area?
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Algebra.Com's Answer #637230 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "It's a quadratic, convert to vertex form.
\n" ); document.write( "\"A%28x%29=40x-x%5E2\"
\n" ); document.write( "\"A%28x%29=-x%5E2%2B40x\"
\n" ); document.write( "\"A%28x%29=-%28x%5E2-40x%29\"
\n" ); document.write( "\"A%28x%29=-%28x%5E2-40x%2B400%29%2B400\"
\n" ); document.write( "\"A%28x%29=-%28x-20%29%5E2%2B400\"
\n" ); document.write( "So the maximum occurs when \"x=20\"\"ft\" and the value is \"A%2820%29=400\"\"ft%5E2\"\r
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