document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=83686>Question 83686</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height h in feet of an object after t seconds is given by the function <BR>\n" );
document.write( "	h = –16t^2 + 70t + 5.  <BR>\n" );
document.write( "How long will it take the object to hit the ground?  Round your answer to the nearest thousandth.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #60169 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=60169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The height h in feet of an object after t seconds is given by the function <BR>\n" );
document.write( "	h = –16t^2 + 70t + 5.  <BR>\n" );
document.write( "How long will it take the object to hit the ground?<BR>\n" );
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document.write( "When it hits the ground its height will be zero.<BR>\n" );
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document.write( "-16t^2+70t+5=0<BR>\n" );
document.write( "t = [-70+-sqrt(70^2-4*-16*5] / -32\r<BR>\n" );
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document.write( "t = [-70+-sqrt(5220)] / -32\r<BR>\n" );
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document.write( "t = [-70+-72.25] / -32\r<BR>\n" );
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document.write( "t = 4.44529... seconds<BR>\n" );
document.write( "===================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );