document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=48251>Question 48251</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is projected upward from the ground. Its distance in feet from the ground in t seconds is given by s(t)= -16t + 208t. At what times will the rocket be 550 feet from 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 #31917 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=31917\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s(t)= -16t + 208t<BR>\n" );
document.write( "550= -16t + 208t  [Set the problem equal to 550 feet]<BR>\n" );
document.write( "550= 192t  [Combine like-terms]<BR>\n" );
document.write( "550/192 = 192t/192  [Solve for \"t\"]<BR>\n" );
document.write( "2.8645 = time<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Check by plugging (2.8645 = t) back into the original equation]<BR>\n" );
document.write( "s(2.8645)= -16(2.8645) + 208(2.8645)<BR>\n" );
document.write( "s(2.8645)= 549.984 = 550 [Checks out] </SPAN>\n" );
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