document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1169506>Question 1169506</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The bulb of the parabolic flashlight should be placed in its focus. If the flashlight is 15 cm deep and 42 cm wide in the opening, how far should the bulb be to the vertex of the parabola? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #794555 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=794555\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Imagining vertex (0,0) and a minimum point, symmetry axis x=0.<BR>\n" );
document.write( "then  parabola also will have  (-21,15) and (21,15).\r<BR>\n" );
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document.write( "Focus, if some p units above the vertex,<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p=75%2F28 ALIGN=MIDDLE  ALT=\"p=75%2F28\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p=2.68 ALIGN=MIDDLE  ALT=\"p=2.68\"   DISABLED_style= \"max-width:90%; height:auto;\" > centimeters </SPAN>\n" );
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