document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1185963>Question 1185963</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Write an equation for the ellipse with each set of characteristics. Then answer the question. Vertices (-7,-3), (13-,3) foci (-5,-3),(11,-3)<BR>\n" );
document.write( "What is the a and b value of the ellipse?<BR>\n" );
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document.write( "The major axis is horizontal; the center of the ellipse is halfway between the vertices (or halfway between the foci), at (3,-3).  The equation is<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-3%29%5E2%2Fa%5E2%2B%28y%2B3%29%5E2%2Fb%5E2=1 ALIGN=MIDDLE  ALT=\"%28x-3%29%5E2%2Fa%5E2%2B%28y%2B3%29%5E2%2Fb%5E2=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "a is the distance from the center to each vertex = 10<BR>\n" );
document.write( "c is the distance from the center to each vertex = 8<BR>\n" );
document.write( "c^2=a^2-b^2 --> b=6<br><BR>\n" );
document.write( "ANSWERS:<BR>\n" );
document.write( "a=10; b=6<BR>\n" );
document.write( "The equation is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-3%29%5E2%2F100%2B%28y%2B3%29%5E2%2F36=1 ALIGN=MIDDLE  ALT=\"%28x-3%29%5E2%2F100%2B%28y%2B3%29%5E2%2F36=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
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