document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=120158>Question 120158</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an object is dropped from an initial height of s feet. the object's height at any time, t in seconds, is given by h=-16t(squared)+s. How long does it take for an object dropped from 300 feet to hit 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 #88090 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=88090\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The initial height, s, is 300 feet, and the final height is 0, because you are concerned with the time it takes to hit the ground.\r<BR>\n" );
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document.write( "So, your equation becomes:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16t%5E2%2B300=0 ALIGN=MIDDLE  ALT=\"-16t%5E2%2B300=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Add -300 to both sides and then multiply by -1:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16t%5E2=300 ALIGN=MIDDLE  ALT=\"16t%5E2=300\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Take the square root of both sides:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4t=sqrt%28300%29 ALIGN=MIDDLE  ALT=\"4t=sqrt%28300%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  (you can ignore the negative square root because you are looking for a positive time value)\r<BR>\n" );
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document.write( "Divide by 4:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=sqrt%2875%29 ALIGN=MIDDLE  ALT=\"t=sqrt%2875%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "But <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=75=3%2A25 ALIGN=MIDDLE  ALT=\"75=3%2A25\"   DISABLED_style= \"max-width:90%; height:auto;\" >, so <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%2875%29=5%2Asqrt%283%29 ALIGN=MIDDLE  ALT=\"sqrt%2875%29=5%2Asqrt%283%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Hence, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=5%2Asqrt%283%29 ALIGN=MIDDLE  ALT=\"t=5%2Asqrt%283%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > seconds.\r<BR>\n" );
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document.write( "Hope this helps,<BR>\n" );
document.write( "John\r<BR>\n" );
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document.write( " </SPAN>\n" );
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