document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=123313>Question 123313</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i need to find the center, and radius of this circle\r<BR>\n" );
document.write( "\n" );
document.write( "x^2+(y-8)^2 = 81\r<BR>\n" );
document.write( "\n" );
document.write( "please help </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #90489 by </B><A HREF=/tutors/aboutme.mpl?userid=chitra><B>chitra(359)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=chitra><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=90489\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The given expression can be written as: \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+%2B+%28y+-+8%29%5E2+=+81 ALIGN=MIDDLE  ALT=\"x%5E2+%2B+%28y+-+8%29%5E2+=+81\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "This can be written as: \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x+-+0%29%5E2+%2B+%28y+-+8%29%5E2+=+81 ALIGN=MIDDLE  ALT=\"%28x+-+0%29%5E2+%2B+%28y+-+8%29%5E2+=+81\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Comparing this with the standard equation: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x+-+h%29%5E2+%2B+%28y+-+k%29%5E2+=+r%5E2 ALIGN=MIDDLE  ALT=\"%28x+-+h%29%5E2+%2B+%28y+-+k%29%5E2+=+r%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Here the centre is (h, k) and \"r\" is the radius.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "So we get: Center = (h,k) = (0, 8) and r^2 = 81 \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Therfore radius, r = 9 units \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Hence, the solution. \r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );