document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1113073>Question 1113073</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The coin is in the shape of a circle of radius 3 cm with a square of sides x cm removed from its centre. The area of each face of the coin is 7pi cm^2. <BR>\n" );
document.write( "i) form an equation in x and show that it reduces to 2pi-x^2=0.<BR>\n" );
document.write( "ii) solve the equation 2pi-x^2=0.<BR>\n" );
document.write( "iii) find the perimeter of the square </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #728142 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=728142\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The coin is in the shape of a circle of radius 3 cm with a square of sides x cm removed from its centre.<BR>\n" );
document.write( " The area of each face of the coin is 7pi cm^2. <BR>\n" );
document.write( " i) form an equation in x and show that it reduces to 2pi-x^2=0.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2A3%5E2+-+x%5E2 ALIGN=MIDDLE  ALT=\"pi%2A3%5E2+-+x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2Api ALIGN=MIDDLE  ALT=\"7%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9pi+-+x%5E2 ALIGN=MIDDLE  ALT=\"9pi+-+x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7pi ALIGN=MIDDLE  ALT=\"7pi\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9pi+-+7pi+-+x%5E2+=+0 ALIGN=MIDDLE  ALT=\"9pi+-+7pi+-+x%5E2+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2pi+-+x%5E2 ALIGN=MIDDLE  ALT=\"2pi+-+x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 0<BR>\n" );
document.write( ":<BR>\n" );
document.write( " ii) solve the equation 2pi-x^2=0.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+=+2pi ALIGN=MIDDLE  ALT=\"x%5E2+=+2pi\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%282pi%29 ALIGN=MIDDLE  ALT=\"sqrt%282pi%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ":<BR>\n" );
document.write( " iii) find the perimeter of the square<BR>\n" );
document.write( "p = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4sqrt%282pi%29 ALIGN=MIDDLE  ALT=\"4sqrt%282pi%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );