document.write( "Question 1038672: Rectangle R has varying length L and width Wbut a constant area of 4ft^2\r
\n" ); document.write( "\n" ); document.write( "A: Express the perimeter P as a function of l and what kind of function is P? wahat is its domain?\r
\n" ); document.write( "\n" ); document.write( "B:Describe the asymptotic behavior of P. What can you say about rectangle R because of this behavior? \r
\n" ); document.write( "\n" ); document.write( "c:For what values of l and w will the perimeter of R be the least?
\n" ); document.write( "Give a geometric explanation. Be sure to include a graph with relevant points labeled.
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Algebra.Com's Answer #653413 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
\"A=L%2AW=4\"
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\n" ); document.write( "A: \"P=2L%2B2W=2%28L%2BW%29=2%284%2FW%2BW%29\"
\n" ); document.write( "The width cannot be less than zero but can be as large as you wish so then the perimeter is the same type of function.
\n" ); document.write( "It cannot be less than zero but it can be as large as you wish.
\n" ); document.write( "\"W%3E0\"
\n" ); document.write( "\"L%3E0\"\r
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\n" ); document.write( "B: As \"W\" gets large, \"4%2FW-%3E0\", so then \"P\" looks like a linear function of \"W\"
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\n" ); document.write( "C: \"P=2%284%2FW%2BW%29\"
\n" ); document.write( "Since it's a function of one variable, you can find the derivative to get the minimum value,
\n" ); document.write( "\"dP%2FdW=-8%2FW%5E2%2B2\"
\n" ); document.write( "\"%28-8%2FW%5E2%29%2B2=0\"
\n" ); document.write( "\"-8%2FW%5E2=-2\"
\n" ); document.write( "\"W%5E2=4\"
\n" ); document.write( "\"W=2\"
\n" ); document.write( "So then,
\n" ); document.write( "\"L=4%2F2\"
\n" ); document.write( "\"L=2\"
\n" ); document.write( "So the minimum perimeter would be,
\n" ); document.write( "\"P=2%282%2B2%29=8\"\"ft\"\r
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