document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=650148>Question 650148</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with a Precalculus problem:\r<BR>\n" );
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document.write( "The weight, W, of an object varies inversely as the square of the distance, d, from the center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weighs 220 lb. Find their weight when they are orbiting 400 mi above sea level.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #407201 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=407201\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The weight, W, of an object varies inversely as the square of the distance, d, from the center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weighs 220 lb. Find their weight when they are orbiting 400 mi above sea level. <BR>\n" );
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document.write( "W = k/r^2<BR>\n" );
document.write( "220 = k/3978^2<BR>\n" );
document.write( "You can solve for k, but it's not necessary.<BR>\n" );
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document.write( "W = 181.64 pounds<BR>\n" );
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