document.write( "Question 1137748: Would someone please help?\r
\n" ); document.write( "\n" ); document.write( "The surface area, A, of a cylinder in terms of its radius, r, and height, h, is given by
\n" ); document.write( "A = 2πr^2 + 2πrh.\r
\n" ); document.write( "\n" ); document.write( " If the height of the cylinder is 4 feet, express the radius as a function of A.
\n" ); document.write( "r(A) =\r
\n" ); document.write( "\n" ); document.write( "Find the radius if the surface area is 350 square feet. (Round your answer to two decimal places.)
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Algebra.Com's Answer #755621 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
(Some help only)\r
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\n" ); document.write( "\n" ); document.write( "A = 2πr^2 + 2πrh\r
\n" ); document.write( "\n" ); document.write( "\"2pi%2Ar%5E2%2B2pi%2Arh-A=0\"\r
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\n" ); document.write( "\n" ); document.write( "\"h=4\"\"given\":\r
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\n" ); document.write( "\n" ); document.write( "\"2pi%2Ar%5E2%2B8pi%2Ar-A=0\"\r
\n" ); document.write( "\n" ); document.write( "\"r=%28-8pi%2B-+sqrt%2864pi%5E2%2B4%2A2%2AA%29%29%2F4\"\r
\n" ); document.write( "\n" ); document.write( "\"r=%28-8pi%2B-+2%2Asqrt%2864pi%5E2%2B2A%29%2F4\"\r
\n" ); document.write( "\n" ); document.write( "\"r=%28-4pi%2B-+sqrt%2864pi%5E2%2B2A%29%29%2F2\"
\n" ); document.write( "but not yet finished.
\n" ); document.write( "Needed restrictions are \"64pi%5E2%2B2A%3E=0\", and \"sqrt%2864pi%5E2%2B2A%29%3E4pi\"\r
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