document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=829633>Question 829633</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the height in feet of a bottle rocket is given by h(t)=160t-t2 where t is the time in seconds. How long will it take for the rocket to return to the ground?\r<BR>\n" );
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document.write( "thanks<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #499975 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=499975\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the height in feet of a bottle rocket is given by h(t)=160t-t2 where t is the time in seconds. How long will it take for the rocket to return to the ground? <BR>\n" );
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document.write( "When the rocket returns to the ground,its height=0<BR>\n" );
document.write( "h(t)=160t-t2<BR>\n" );
document.write( "0=160t-t2<BR>\n" );
document.write( "-t^2+160t=0<BR>\n" );
document.write( "-t(t-160)=0<BR>\n" );
document.write( "t=0(reject,t>0)<BR>\n" );
document.write( "or<BR>\n" );
document.write( "t-160=0<BR>\n" );
document.write( "t=160<BR>\n" );
document.write( "How long will it take for the rocket to return to the ground? 160 seconds </SPAN>\n" );
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