document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=310945>Question 310945</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Will you please help me with this word problem? I don't understand how to use pi and write formulas from these problems.    A semicircular window of radius 10 inches is to be laminated with a sunblock coating that costs .85 per square inch to apply.  What is the total cost of coating the window, to the nearest cent? (use pi=3.14. hint: area of circle is A=pi r^2) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #222374 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=222374\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Remember <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi ALIGN=MIDDLE  ALT=\"pi\"   DISABLED_style= \"max-width:90%; height:auto;\" > is just a number. There's nothing magical about it.<BR>\n" );
document.write( "You're charged by the area for the coating so calculate the area of the window.<BR>\n" );
document.write( "If it was a whole circle, the area would be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=pi%2Ar%5E2 ALIGN=MIDDLE  ALT=\"A=pi%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >. Since it's 1/2 a window (semi-circle) the area would be half that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=%281%2F2%29pi%2Ar%5E2 ALIGN=MIDDLE  ALT=\"A=%281%2F2%29pi%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Total Cost=Cost/Area * Area<BR>\n" );
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document.write( "TC=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.85%2A%281%2F2%29%283.14%29%2810%29%5E2 ALIGN=MIDDLE  ALT=\"0.85%2A%281%2F2%29%283.14%29%2810%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >=$133.45. </SPAN>\n" );
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