document.write( "Question 853217: A car’s headlight contains a parabolic reflector. A special bulb with two filaments is used to produce
\n" ); document.write( "the high and low beams. The filament placed at the focus produces the high beam and the filament
\n" ); document.write( "placed off-focus produces the low beam. The equation of the reflector is y=1/12x^2. How far from the
\n" ); document.write( "vertex should the filament for the high beam be placed? \n" ); document.write( "
Algebra.Com's Answer #513987 by lwsshak3(11628)\"\" \"About 
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A car’s headlight contains a parabolic reflector. A special bulb with two filaments is used to produce
\n" ); document.write( "the high and low beams. The filament placed at the focus produces the high beam and the filament
\n" ); document.write( "placed off-focus produces the low beam. The equation of the reflector is y=1/12x^2. How far from the
\n" ); document.write( "vertex should the filament for the high beam be placed?
\n" ); document.write( "***
\n" ); document.write( "y=(1/12)x^2
\n" ); document.write( "x^2=12y
\n" ); document.write( "Form of an equation for a parabola with vertex at the origin: y=4py
\n" ); document.write( "For gven problem:
\n" ); document.write( "4p=12
\n" ); document.write( "p=3(distance from vertex to focus on the axis of symmetry)
\n" ); document.write( "ans: The filament should be placed 3 inches(units?)from the vertex. \n" ); document.write( "
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