document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=414438>Question 414438</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Neglecting air resistance, the number of feet s that an onject fall from rest during t seconds is give by the formula s+16tsquared.  How long would it take an object to reach the earth if it is dropped from 12,000 feet? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #290666 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=290666\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Neglecting air resistance, the number of feet s that an onject fall from rest during t seconds is give by the formula s(t) = -16tsquared + h. How long would it take an object to reach the earth if it is dropped from 12,000 feet?<BR>\n" );
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document.write( "s(t) = -16t^2 + h where s(t) is the height after t seconds and h is<BR>\n" );
document.write( "the initial height.<BR>\n" );
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document.write( "The height is zero when the object hits the ground.<BR>\n" );
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document.write( "Solve -16t^2 + 12000 = 0<BR>\n" );
document.write( "-16t^2 = -12000<BR>\n" );
document.write( "t^2 = 12000/16<BR>\n" );
document.write( "t = sqrt(12000)/4<BR>\n" );
document.write( "t = 27.39 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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