document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=211552>Question 211552</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0136007317/algebrahomeworkh>Beginning & Intermediate Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> An object is dropped from 39 feet below the tip of the pinnacle atop one of the 1483-foot-tall Petronas Twin Towers in Kuala Lumpur, Malaysia. (Source: Council on tall buildings and Urban Habitat) The height h of the object after t seconds is given by the equation h = -16t^2 + 1444. Find how many seconds pass before the object reaches the ground.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #159846 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=159846\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h = -16t^2 + 1444<BR>\n" );
document.write( "At impact, h = 0<BR>\n" );
document.write( "-16t^2 + 1444 = 0<BR>\n" );
document.write( "t^2 = 1444/16<BR>\n" );
document.write( "t = 38/4<BR>\n" );
document.write( "t = 9.5 seconds </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );