document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=534070>Question 534070</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Billy drops an egg off the roof of a buliding 80 ft above ground.  Using the model .  How long did it take for the egg to hit the ground? using the equation h=-16t^2+h\r<BR>\n" );
document.write( "\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 #351265 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=351265\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Billy drops an egg off the roof of a buliding 80 ft above ground. Using the model . How long did it take for the egg to hit the ground? using the equation h(t)=-16t^2+h <BR>\n" );
document.write( ".<BR>\n" );
document.write( "Set h to 80 (represents initial height)<BR>\n" );
document.write( "and <BR>\n" );
document.write( "set h(t) to zero (represents ground level)<BR>\n" );
document.write( "solve for t:<BR>\n" );
document.write( "h(t)=-16t^2+h <BR>\n" );
document.write( "0=-16t^2+80<BR>\n" );
document.write( "16t^2 = 80<BR>\n" );
document.write( "t^2 = 5<BR>\n" );
document.write( "t = sqrt(5)<BR>\n" );
document.write( "t = 2.24 seconds\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );