document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=610385>Question 610385</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a ball is released to a fall down from the top of a building 30 meters high, how many seconds will it take for the ball to reach 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 #384350 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=384350\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a ball is released to a fall down from the top of a building 30 meters high, how many seconds will it take for the ball to reach the ground?<BR>\n" );
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document.write( "h(t) = -9.8t^2 + 30<BR>\n" );
document.write( "----<BR>\n" );
document.write( "When the ball hits the ground h(t) = 0<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Solve:<BR>\n" );
document.write( "-9.8t^2+30 = 0<BR>\n" );
document.write( "9.8t^2 = 30<BR>\n" );
document.write( "t^2 = 3.06<BR>\n" );
document.write( "time = 1.75 seconds<BR>\n" );
document.write( "=======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "======================= </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );