document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=529881>Question 529881</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A cylinder has a height of 1.5 inches and a total surface area of 4pi square inches. What is its approximate radius rounded to the nearest hundredth? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #349851 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=349851\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A cylinder has a height of 1.5 inches and a total surface area of 4pi square inches.<BR>\n" );
document.write( " What is its approximate radius rounded to the nearest hundredth?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "The surface area of a cylinder is  given by the formula:<BR>\n" );
document.write( "S.A. = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Ar%5E2 ALIGN=MIDDLE  ALT=\"2%2Api%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Ar%2Ah ALIGN=MIDDLE  ALT=\"2%2Api%2Ar%2Ah\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Using the given values<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Ar%5E2 ALIGN=MIDDLE  ALT=\"2%2Api%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Ar%2A1.5 ALIGN=MIDDLE  ALT=\"2%2Api%2Ar%2A1.5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4pi ALIGN=MIDDLE  ALT=\"4pi\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "we can greatly simplify this, divide thru by 2pi, results<BR>\n" );
document.write( "r^2 + 1.5r = 2<BR>\n" );
document.write( "r^2 + 1.5r - 2 = 0<BR>\n" );
document.write( "Using the quadratic formula, where a=1, b=1.5 c=-2<BR>\n" );
document.write( "The positive solution .85078, approx radius = .85 inches </SPAN>\n" );
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