document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=600404>Question 600404</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is kicked upward with an initial velocity of 56 feet per second. The ball's height h (in feet) can be expressed as a function of time t (in seconds) by the equation h = -16t2 + 56t. How much time does the ball take to reach its highest point? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #379314 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=379314\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">     A ball is kicked upward with an initial velocity of 56 feet per second. The ball's height h (in feet) can be expressed as a function of time t (in seconds) by the equation h = -16t2 + 56t. How much time does the ball take to reach its highest point?<BR>\n" );
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document.write( "Max is at the vertex.<BR>\n" );
document.write( "t value at the vertex can be found by:<BR>\n" );
document.write( "t = -b/(2a)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "substitute in the values of a,b from:<BR>\n" );
document.write( "h = -16t2 + 56t<BR>\n" );
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document.write( "t = -b/(2a)<BR>\n" );
document.write( "t = -56/(2(-16))<BR>\n" );
document.write( "t = -56/(-32)<BR>\n" );
document.write( "t = 1.75 seconds<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );