document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1067893>Question 1067893</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The reflecting surface of a parabolic antenna has the shape formed when the parabola <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+%281%2F36%29x%5E2+ ALIGN=MIDDLE  ALT=\"+y+=+%281%2F36%29x%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is rotated about its axis of symmetry. If the measurements are in feet, how far from the vertex should the receiver be placed if it is to be at the focus? \r<BR>\n" );
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document.write( "I am having a hard time solving this problem. I do not understand the question, any sort of assistance would be greatly appreciated!   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #683068 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52790)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=683068\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Look at (or read) these lessons\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=http://www.algebra.com/algebra/homework/Quadratic-relations-and-conic-sections/Parabola-definition--canonical-equation--characteristic-points-and-elements.lesson>Parabola definition, canonical equation, characteristic points and elements</A> \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=http://www.algebra.com/algebra/homework/Quadratic-relations-and-conic-sections/Parabola-focal-property.lesson>Parabola focal property</A> \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=http://www.algebra.com/algebra/homework/Quadratic-relations-and-conic-sections/Tangent-lines-to-a-parabola.lesson>Tangent lines and normal vectors to a parabola</A> \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=http://www.algebra.com/algebra/homework/Quadratic-relations-and-conic-sections/Optical-property-of-a-parabola.lesson>Optical property of a parabola</A>\r<BR>\n" );
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document.write( "in this site.\r<BR>\n" );
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