document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=411661>Question 411661</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If one of you has a moment can you please help.\r<BR>\n" );
document.write( "\n" );
document.write( "A ball is propelled upward from ground level.  After t seconds, its height in feet is a function defined by f(t)=-16t^2 + 96t.   After how many seconds will it reach a height of 144 feet?\r<BR>\n" );
document.write( "\n" );
document.write( "a. 2 seconds<BR>\n" );
document.write( "b. 3 seconds<BR>\n" );
document.write( "c. 4 seconds<BR>\n" );
document.write( "d. 6 seconds </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #289313 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=289313\">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=+f%28t%29=-16t%5E2+%2B+96t ALIGN=MIDDLE  ALT=\"+f%28t%29=-16t%5E2+%2B+96t\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=144+=+-16t%5E2+%2B+96t ALIGN=MIDDLE  ALT=\"144+=+-16t%5E2+%2B+96t\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16t%5E2+%2B+96t+-+144+=+0 ALIGN=MIDDLE  ALT=\"-16t%5E2+%2B+96t+-+144+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-t%5E2+%2B+6t+-+9+=+0 ALIGN=MIDDLE  ALT=\"-t%5E2+%2B+6t+-+9+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-t+%2B+3%29%2A%28t+-+3%29+=+0 ALIGN=MIDDLE  ALT=\"%28-t+%2B+3%29%2A%28t+-+3%29+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >  (I just figured it out- pretty simple)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+3 ALIGN=MIDDLE  ALT=\"t+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The answer is (b)<BR>\n" );
document.write( "check answer:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=144+=+-16%2A3%5E2+%2B+96%2A3 ALIGN=MIDDLE  ALT=\"144+=+-16%2A3%5E2+%2B+96%2A3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=144+=+-144+%2B+288 ALIGN=MIDDLE  ALT=\"144+=+-144+%2B+288\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=144+=+144 ALIGN=MIDDLE  ALT=\"144+=+144\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );