document.write( "Question 1061339: An open box is made from a rectangular piece of material, 13 inches by 10.5 inches, by cutting equal squares (let it's side is x)from each corner and turning up the side.
\n" ); document.write( "1. What is the dimensions of the box that has the maximum volume (V max)
\n" ); document.write( "2. What is the maximum volume of the box (V max)
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Algebra.Com's Answer #676127 by josgarithmetic(39618)\"\" \"About 
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Let x be the edge length of each square to be cut.\r
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\n" ); document.write( "\n" ); document.write( "v for volume, will be
\n" ); document.write( "\"highlight%28v=x%2813-2x%29%2810.5-2x%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"v=4x%5E3-47x%5E2%2B136.5x\"\r
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\n" ); document.write( "\n" ); document.write( "Maximize v, by looking for local max value or values.
\n" ); document.write( "\"dv%2Fdt=highlight_green%2812x%5E2-94x%2B136.5=0%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x=%2894%2B-+sqrt%282284%29%29%2F%282%2A12%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"highlight_green%28x=%2847%2B-+sqrt%28571%29%29%2F12%29\"
\n" ); document.write( "Two values to examine. Which of them is a maximum?
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\n" ); document.write( "\n" ); document.write( "The decimal approximations for those values to examine are 1.93 and 5.91.
\n" ); document.write( "If you think about the basic shape to expect for a cubic equation, such as for your volume,
\n" ); document.write( "the maximum value will be to the left of the minimum value for the volume function.
\n" ); document.write( "Expect x=1.93 to be your answer.
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