document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=516578>Question 516578</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A cable TV receiving dish is in the shape of a paraboloid of revolution. Find the location of the receiver, which is placed at the focus, if the dish is 6 feet across at its opening and 2 feet deep. Sketch the paraboloid. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #344423 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=344423\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A cable TV receiving dish is in the shape of a paraboloid of revolution. Find the location of the receiver, which is placed at the focus, if the dish is 6 feet across at its opening and 2 feet deep. Sketch the paraboloid.<BR>\n" );
document.write( "**<BR>\n" );
document.write( "I don't have the means to draw a sketch, but I can describe the parabola for you:<BR>\n" );
document.write( "Draw a parabola which opens upwards with the vertex at (0,0), one end at (-3,2) and the other at (3,2).<BR>\n" );
document.write( "Equation of the parabola: x^2=4py<BR>\n" );
document.write( "Location of the receiver will be p-ft from the vertex on the axis of symmetry, x=0.<BR>\n" );
document.write( "Using one of the points (3,2) to solve for p.<BR>\n" );
document.write( "3^2=4p*2<BR>\n" );
document.write( "9=8p<BR>\n" );
document.write( "p=9/8 ft<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "The receiver will be placed at 9/8 ft above the vertex on the axis of symmetry. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );