document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1143296>Question 1143296</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 #764079 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=764079\">put this solution on YOUR website!</A><BR><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? <BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "h(t) = −16t^2+60t+14<BR>\n" );
document.write( "−16t^2+60t+14 = 30<BR>\n" );
document.write( "Solve for t<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );