document.write( "Question 174569: This is one is tough!
\n" ); document.write( "A rectangular enclosure is made with 100 ft. of fencing on three sides. The fourth side is the wall of a barn. Find the greatest possible area of such an enclosure. My choices are as follows: A) 400ft^2 B) 625 ft^2 C) 1111.1 ft ^2 D) 2500ft^2. \n" ); document.write( "

Algebra.Com's Answer #129588 by Edwin McCravy(20055) $\"\"$ $\"About$

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Edwin's solution:\r
\n" ); document.write( "\n" ); document.write( "A rectangular enclosure is made with 100 ft. of fencing on three sides. The fourth side is the wall of a barn. Find the greatest possible area of such an enclosure. My choices are as follows: A) 400ft^2 B) 625 ft^2 C) 1111.1 ft ^2 D) 2500ft^2.
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document.write( "Let y = the area.\r\n" );
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document.write( "The vertex of the parabola \r\n" );
document.write( "is , so the vertex here is ,  \r\n" );
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document.write( "The graph is \r\n" );
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document.write( "So the maximum area is .  That is not one of the\r\n" );
document.write( "choices, so the problem is botched somehow.\r\n" );
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document.write( "Edwin

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