document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=920925>Question 920925</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this equation tutors! \r<BR>\n" );
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document.write( "An object is launched directly upward at 64m/sec from a platform 80m high. Its path is modeled by the equation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+h=-16t%5E2+%2B+64t+%2B+80+ ALIGN=MIDDLE  ALT=\"+h=-16t%5E2+%2B+64t+%2B+80+\"   DISABLED_style= \"max-width:90%; height:auto;\" > where h is the height abobe the ground and t is the time in seconds.\r<BR>\n" );
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document.write( "a) When will the object hit the ground?\r<BR>\n" );
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document.write( "b) What will be the object's maximum height?\r<BR>\n" );
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document.write( "c) When will it attain this height\r<BR>\n" );
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document.write( "Thank you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558625 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=558625\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+h=-16t%5E2+%2B+64t+%2B+80+ ALIGN=MIDDLE  ALT=\"+h=-16t%5E2+%2B+64t+%2B+80+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "h = -16(t -2)^2 + 64 + 80<BR>\n" );
document.write( "h = -16(t -2)^2 + 144<BR>\n" );
document.write( "a) When will the object hit the ground? <BR>\n" );
document.write( "0 = -16(t -2)^2 + 144<BR>\n" );
document.write( "(t -2)^2 = 9<BR>\n" );
document.write( "t -2 = 3<BR>\n" );
document.write( "t = 5 sec<BR>\n" );
document.write( "....<BR>\n" );
document.write( "h = -16(t -2)^2 + 144<BR>\n" );
document.write( "b) What will be the object's maximum height? 144m<BR>\n" );
document.write( " c) When will it attain this height: 2sec  </SPAN>\n" );
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