document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1143414>Question 1143414</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height of a cannonball shot upward from a height of 14 feet above the ground with an initial velocity of 60 ​feet/second is given by the equation <BR>\n" );
document.write( "h equals negative 16 t squared plus 60 t plus 14<BR>\n" );
document.write( "h=−16t2+60t+14. \r<BR>\n" );
document.write( "\n" );
document.write( "After how many seconds will the cannonball be 30 feet above 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 #764214 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=764214\">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=30=-16t%5E2%2B60t%2B14 ALIGN=MIDDLE  ALT=\"30=-16t%5E2%2B60t%2B14\"   DISABLED_style= \"max-width:90%; height:auto;\" >, by substitution.  Can you solve that? </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );