document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1078733>Question 1078733</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the distance formula to find the equation of a parabola with a focus at (0, 20) and a directrix at the x-axis, y = -10.\r<BR>\n" );
document.write( "\n" );
document.write( "y = (1/30)x^2 + 10<BR>\n" );
document.write( "y = (1/60)x^2 + 5<BR>\n" );
document.write( "y = (1/60)x^2 + 10<BR>\n" );
document.write( "y = (1/30)x^2 + 5<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #693165 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=693165\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the vertex is at (0,5), half way between the focus and the directrix.<BR>\n" );
document.write( "half the distance is 15<BR>\n" );
document.write( "This is a y=x^2 type of parabola<BR>\n" );
document.write( "(x)^2=4p(y-5)<BR>\n" );
document.write( "x^2=60p(y-5)<BR>\n" );
document.write( "y=(x^2/60)+5 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );