document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=432084>Question 432084</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9)	It is possible to estimate how far away a bolt of lightning is by counting the seconds between the flash and the thunder. If we let the variable s represent the number of seconds, then a bolt of lighting is approximately   miles away. <BR>\n" );
document.write( "a.	A lifeguard sees a flash of lightning. After 20 seconds, she hears thunder. About far away was the lightning?\r<BR>\n" );
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document.write( "b.	A golfer sees a bolt of lightning strike a tree a few holes away. He hears the thunder for about 2.5 seconds later. About how far away from the tree is he standing?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #299703 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=299703\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It is possible to estimate how far away a bolt of lightning is by counting the seconds between the flash and the thunder.<BR>\n" );
document.write( " If we let the variable s represent the number of seconds, then a bolt of <BR>\n" );
document.write( "lighting is approximately miles away.<BR>\n" );
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document.write( "Use 1100 ft/sec for the speed of sound<BR>\n" );
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document.write( "a. A lifeguard sees a flash of lightning.<BR>\n" );
document.write( " After 20 seconds, she hears thunder. About far away was the lightning?<BR>\n" );
document.write( "d = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281100+%2A+20%29%2F5280 ALIGN=MIDDLE  ALT=\"%281100+%2A+20%29%2F5280\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d = 4.167 miles away<BR>\n" );
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document.write( "b. A golfer sees a bolt of lightning strike a tree a few holes away.<BR>\n" );
document.write( " He hears the thunder for about 2.5 seconds later.<BR>\n" );
document.write( " About how far away from the tree is he standing?<BR>\n" );
document.write( "d = 2.5 * 1100<BR>\n" );
document.write( "d = 2,750 ft away </SPAN>\n" );
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