document.write( "Question 727525: A farmer has 400 feet of fencing. He wants to fence off a rectangular field that borders a straight river (no fence along the river). What are the dimensions that will give him the largest area? Please check to see if I have the right answer. Thanks.\r
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document.write( "A=(400-2w)w
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document.write( "A= -2w^2+400w\r
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document.write( "-b/2a=-400/-4=100 width\r
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document.write( "l=400-2(100)
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document.write( "l=200\r
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document.write( "dimensions are 200ft by 100ft\r
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Algebra.Com's Answer #445110 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! a square yields the largest area. \n" ); document.write( "the 400 ft will cover three equal sides \n" ); document.write( "400/3=133.33 for each side \n" ); document.write( " \n" ); document.write( " |