document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=605863>Question 605863</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown upward with a velociity of 80ft/s from a height of 576ft.  H= -16t^2+80t=576 gives the height,h, after t sec.  Find the time when the ball is 300ft above the ground.  H value is 300\r<BR>\n" );
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document.write( "OK--I know how that I have to set it to zero by subtracting 300 from 576.  It will not factor out evenly.  After setting it up with the quadratic formula, I am still getting it wrong.  Please help me.  I am on my 5th problem like this and am severly struggleing. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #381841 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=381841\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=H=+-16t%5E2%2B80t%2B576 ALIGN=MIDDLE  ALT=\"H=+-16t%5E2%2B80t%2B576\"   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=300+=+-16t%5E2%2B80t%2B576 ALIGN=MIDDLE  ALT=\"300+=+-16t%5E2%2B80t%2B576\"   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=0+=+-16t%5E2%2B80t%2B576-300 ALIGN=MIDDLE  ALT=\"0+=+-16t%5E2%2B80t%2B576-300\"   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=0+=+-16t%5E2%2B80t%2B276 ALIGN=MIDDLE  ALT=\"0+=+-16t%5E2%2B80t%2B276\"   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=-16t%5E2%2B80t%2B276+=+0 ALIGN=MIDDLE  ALT=\"-16t%5E2%2B80t%2B276+=+0\"   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=16t%5E2-80t-276+=+0 ALIGN=MIDDLE  ALT=\"16t%5E2-80t-276+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now use the quadratic formula to solve\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29 ALIGN=MIDDLE  ALT=\"t+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"   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=t+=+%28-%28-80%29%2B-sqrt%28%28-80%29%5E2-4%2816%29%28-276%29%29%29%2F%282%2816%29%29 ALIGN=MIDDLE  ALT=\"t+=+%28-%28-80%29%2B-sqrt%28%28-80%29%5E2-4%2816%29%28-276%29%29%29%2F%282%2816%29%29\"   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=t+=+%2880%2B-sqrt%286400-%28-17664%29%29%29%2F%2832%29 ALIGN=MIDDLE  ALT=\"t+=+%2880%2B-sqrt%286400-%28-17664%29%29%29%2F%2832%29\"   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=t+=+%2880%2B-sqrt%2824064%29%29%2F32 ALIGN=MIDDLE  ALT=\"t+=+%2880%2B-sqrt%2824064%29%29%2F32\"   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=t+=+%2880%2Bsqrt%2824064%29%29%2F32 ALIGN=MIDDLE  ALT=\"t+=+%2880%2Bsqrt%2824064%29%29%2F32\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%2880-sqrt%2824064%29%29%2F32 ALIGN=MIDDLE  ALT=\"t+=+%2880-sqrt%2824064%29%29%2F32\"   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=t+=+%2880%2B16%2Asqrt%2894%29%29%2F32 ALIGN=MIDDLE  ALT=\"t+=+%2880%2B16%2Asqrt%2894%29%29%2F32\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%2880-16%2Asqrt%2894%29%29%2F32 ALIGN=MIDDLE  ALT=\"t+=+%2880-16%2Asqrt%2894%29%29%2F32\"   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=t+=+%285%2Bsqrt%2894%29%29%2F2 ALIGN=MIDDLE  ALT=\"t+=+%285%2Bsqrt%2894%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%285-sqrt%2894%29%29%2F2 ALIGN=MIDDLE  ALT=\"t+=+%285-sqrt%2894%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > <font color=\"blue\"><--- Exact Solutions</font>\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+7.34767985741632 ALIGN=MIDDLE  ALT=\"t+=+7.34767985741632\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+-2.34767985741632 ALIGN=MIDDLE  ALT=\"t+=+-2.34767985741632\"   DISABLED_style= \"max-width:90%; height:auto;\" > <font color=\"red\"><--- Approximate Solutions</font>\r<BR>\n" );
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document.write( "We now ignore the negative solution since a negative time value doesn't make any sense.\r<BR>\n" );
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document.write( "So the ball is 300 ft above the ground at approximately <font color=\"red\">7.34767985741632</font> seconds </SPAN>\n" );
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