document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=476276>Question 476276</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please help me solve this story problem. A ball is thrown downward from a window in a tall building. It's position at time t in seconds is s=16t^2+32t, where s is in feet. How long (to the nearest tenth) will it take the ball to fall 217 feet? I took 217=16t^2+32t = -217 = 16t^2+32t-217=0 I did a=16, b=32, and c= -217. I used the formula -b+-&#8730;b^2-4ac/2a I got -32+-&#8730;14,912/32. I'm lost from that point on to get the answer. I have the answer key it says it's 2.8 seconds. Can you help me complete this? Thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #326703 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=326703\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> you want the positive value for your solution\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "[-32 + sqrt(14912)] / 32\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "this should work on your calculator </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );