document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1161261>Question 1161261</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An object is thrown downward with an initial velocity of 7 feet per second. The relationship between the distance s it travels and time t is given by s=7t+16t^2. How long does it take the object to fall 78 feet? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #784774 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=784774\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s=7t+16t^2=78<BR>\n" );
document.write( "so 16t^2+7t-78=0<BR>\n" );
document.write( "(16t+39)(t-2)=0<BR>\n" );
document.write( "t=2 seconds.\r<BR>\n" );
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