document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=480992>Question 480992</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A reflector for a satellite dish is parabolic in cross section, with the receiver at the focus. The reflector is 1 ft. deep and 20 ft. wide from rim to rim. How far is receiver from the vertex of the parabola reflector? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #329461 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=329461\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A reflector for a satellite dish is parabolic in cross section, with the receiver at the focus. The reflector is 1 ft. deep and 20 ft. wide from rim to rim. How far is receiver from the vertex of the parabola reflector?<BR>\n" );
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document.write( "With the satellite dish facing up, place the vertex at the origin, (0,0), and using the right edge of the rim as a point (10,1) on the parabola. This configuration will give the equation of a parabola, <BR>\n" );
document.write( "x^2=4py, p=distance from vertex to focus.<BR>\n" );
document.write( "10^2=4p(1)<BR>\n" );
document.write( "4p=100<BR>\n" );
document.write( "p=25<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "The receiver will be 25 ft above the vertex of the parabola reflector. </SPAN>\n" );
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