document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=154102>Question 154102</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0072855436/algebrahomeworkh>elementary and intermediate algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> #68 I have tried to work this problem but I am having much trouble can you help, please. Skydiving. If a sky diver jumps from an airplane at a height of 8256 feet, then for the first 5 seconds, her height above the earth is approximated by the formula h = 16r^2 + 8256. How many seconds does it take her to reach 8000 feet. <BR>\n" );
document.write( "Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #113416 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=113416\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h = -16r^2 + 8256.<BR>\n" );
document.write( "h will be zero when she is back on the ground.<BR>\n" );
document.write( "-16 is represents the effect of gravity on her body.<BR>\n" );
document.write( "-16t^2 = -8256<BR>\n" );
document.write( "t^2 = 8256/16<BR>\n" );
document.write( "t = 22.72 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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