document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1008925>Question 1008925</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve please:\r<BR>\n" );
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document.write( "The entrance to an athletic field is in the shape of a parabolic archway. The archway is modeled by the equation d = 12x = x^2, where d represents the distance, in feet, that the arch is above the ground for any x value.\r<BR>\n" );
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document.write( "a. For what values of x will the arch be 20 feet above the ground?\r<BR>\n" );
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document.write( "b. How many feet wide is the arch?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #624450 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=624450\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The entrance to an athletic field is in the shape of a parabolic archway. The archway is modeled by the equation d = 12x - x^2, where d represents the distance, in feet, that the arch is above the ground for any x value. <BR>\n" );
document.write( "a. For what values of x will the arch be 20 feet above the ground?<BR>\n" );
document.write( "Solve::<BR>\n" );
document.write( "12x - x^2 = 20<BR>\n" );
document.write( "x^2 - 12x + 20 = 0<BR>\n" );
document.write( "(x-2)(x-10) = 0<BR>\n" );
document.write( "Ans: x = 2 ft and x = 10 ft<BR>\n" );
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document.write( "b. How many feet wide is the arch?<BR>\n" );
document.write( "Solve::<BR>\n" );
document.write( "12x - x^2 = 0<BR>\n" );
document.write( "x^2 - 12x = 0<BR>\n" );
document.write( "x(x-12) = 0<BR>\n" );
document.write( "x = 0 and x = 12<BR>\n" );
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document.write( "Ans: 12 ft.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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