document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=955232>Question 955232</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume you are throwing a baseball up from the top of a building.  The equation for the height of the ball, h, at time, t, is represented by the equation:     h=-16t^2+64t+512<BR>\n" );
document.write( "After how many seconds does the ball reach 432 feet?  \r<BR>\n" );
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document.write( "I have gotten to this:   0=16t^2+64t+80 and then I get stuck.  Please help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #583472 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=583472\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assume you are throwing a baseball up from the top of a building. The equation for the height of the ball, h, at time, t, is represented by the equation: h=-16t^2+64t+512<BR>\n" );
document.write( " After how many seconds does the ball reach 432 feet?<BR>\n" );
document.write( "Solve:<BR>\n" );
document.write( "-16t^2 + 64t + 512 = 432<BR>\n" );
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document.write( "16t^2 - 64t -80 = 0<BR>\n" );
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document.write( "t^2 - 4t - 5 = 0<BR>\n" );
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document.write( "(t-5)(t+1) = 0<BR>\n" );
document.write( "Ans:: t = 5 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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