document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=95463>Question 95463</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 + 30t + 4.  <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 #69466 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=69466\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let h=0 because the height is zero when the object hits the ground.<BR>\n" );
document.write( "Then solve for t.<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "h = –16t^2 + 30t + 4. <BR>\n" );
document.write( "-16t^2+30t+4 = 0<BR>\n" );
document.write( "Divide thru by -2 to get:<BR>\n" );
document.write( "8t^2-15t-2 = 0<BR>\n" );
document.write( "Factor to get:<BR>\n" );
document.write( "(8t+1)(t-2)= 0<BR>\n" );
document.write( "Positive solution:<BR>\n" );
document.write( "t = 2 seconds\r<BR>\n" );
document.write( "\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );