document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=694643>Question 694643</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Bob throws a ball vertically upward from the top of the cliff, the height of the ball above the base of the cliff is approximated by the model h = 6s + 10t- 5t ^2 where h is the height in metres and t is the time in seconds. <BR>\n" );
document.write( "a) How high is the cliff?<BR>\n" );
document.write( "b) How long does it take the ball to reach a height of 50 metres above the cliff?<BR>\n" );
document.write( "c) After how many seconds does the ball hit the ground? <BR>\n" );
document.write( "can you please help me out? I really don't understand can you go step by step. Thanks in advance :) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #428119 by </B><A HREF=/tutors/aboutme.mpl?userid=DrBeeee><B>DrBeeee(684)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=DrBeeee><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=428119\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What is 6s? </SPAN>\n" );
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