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 #222375 by </B><A HREF=/tutors/aboutme.mpl?userid=mollukutti><B>mollukutti(30)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mollukutti><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=mollukutti><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=222375\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Cost per sq inch is .85\r<BR>\n" );
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document.write( "We know Area of a circle = Pi x r^2 where r is the radius<BR>\n" );
document.write( "Pi= 3.14<BR>\n" );
document.write( "Radius= 10\r<BR>\n" );
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document.write( "Area of the circle= Pi x r^2<BR>\n" );
document.write( "= 3.14 x 10^2<BR>\n" );
document.write( "= 3.14 x 100<BR>\n" );
document.write( "= 314\r<BR>\n" );
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document.write( "The given window is semicircular in shape, hence its area will be half the area of the above circle<BR>\n" );
document.write( "= 314 / 2<BR>\n" );
document.write( "= 157 sq inches\r<BR>\n" );
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document.write( "Hence cost of coating the window will be  157 x .85 = 133.45 </SPAN>\n" );
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