document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1106911>Question 1106911</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A model rocket is launched from the ground with an inital velocity of 68 m/s. The function h = -4.9t + 68t models the height of the rocket in metres after t seconds. At what time is the rocket above 72 m above 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 #721909 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=721909\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -4.9t + 68t = h<BR>\n" );
document.write( "63.1t = 72<BR>\n" );
document.write( "t = 72/63.1 = 1.14 seconds\r<BR>\n" );
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document.write( " </SPAN>\n" );
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