document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=87236>Question 87236</A>: <I><SPAN STYLE=\"word-break: break-all;\">  	 Please solve the problem, if possible step by step\r<BR>\n" );
document.write( "\n" );
document.write( "A rock falls from a tower that is 73.5 m high. As it is falling, its height is given by the formula h = 735 - 4.9t^2, with t in seconds. How many seconds will it take for the rock to hit the ground (h = 0)?<BR>\n" );
document.write( "Question 10 answers<BR>\n" );
document.write( "		8.3 sec<BR>\n" );
document.write( "		3.9 sec<BR>\n" );
document.write( "		1102.5 sec<BR>\n" );
document.write( "		8.6 sec </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #63183 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=63183\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%28t%29+=+73.5-4.9t%5E2 ALIGN=MIDDLE  ALT=\"h%28t%29+=+73.5-4.9t%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > where 73.5 meters is the initial height of the rock, how long before it hits the ground?<BR>\n" );
document.write( "Set h(t) = 0 and solve for t.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=73.5-4.9t%5E2+=+0 ALIGN=MIDDLE  ALT=\"73.5-4.9t%5E2+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" > Add <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4.9t%5E2 ALIGN=MIDDLE  ALT=\"4.9t%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > to both sides.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=73.5+=+4.9t%5E2 ALIGN=MIDDLE  ALT=\"73.5+=+4.9t%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > Divide both sides by 4.9<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15+=+t%5E2 ALIGN=MIDDLE  ALT=\"15+=+t%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > Now take the square root of both sides.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+3.873 ALIGN=MIDDLE  ALT=\"t+=+3.873\"   DISABLED_style= \"max-width:90%; height:auto;\" >seconds.<BR>\n" );
document.write( "The best choice of answers is:<BR>\n" );
document.write( "3.9 seconds. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );