document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=645426>Question 645426</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 1970, Russia began drilling a deep borehole in the Kola Peninsula. Their goal was to reach a depth of 15km, but high temperatures in the hole forced them to stop in 1994 after reaching a depth of 12km. They found that below 3km the temperature increased 2.5 degrees Celcius for each additional 100m of depth. \r<BR>\n" );
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document.write( "If the temperature at 3km is 30 degrees Celsius and x is the depth of the hole in km, write an equation using x that will give the temperature in the hole at any depth below 3km.\r<BR>\n" );
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document.write( "At what depth would they reach a temperature of 200 degrees Celcius? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #405558 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=405558\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In 1970, Russia began drilling a deep borehole in the Kola Peninsula.<BR>\n" );
document.write( " Their goal was to reach a depth of 15km, but high temperatures in the hole<BR>\n" );
document.write( " forced them to stop in 1994 after reaching a depth of 12km.<BR>\n" );
document.write( " They found that below 3km the temperature increased 2.5 degrees Celsius<BR>\n" );
document.write( " for each additional 100m of depth.<BR>\n" );
document.write( "If the temperature at 3km is 30 degrees Celsius and x is the depth of the<BR>\n" );
document.write( " hole in km, write an equation using x that will give the temperature in<BR>\n" );
document.write( " the hole at any depth below 3km.<BR>\n" );
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document.write( "2.5 degrees every 100 m, would be 25 degrees for every km<BR>\n" );
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document.write( "t(x) = 25x + 30<BR>\n" );
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document.write( "At what depth would they reach a temperature of 200 degrees Celsius?<BR>\n" );
document.write( "25x + 30 = 200<BR>\n" );
document.write( "25x = 200 - 30<BR>\n" );
document.write( "25x = 170<BR>\n" );
document.write( "x = 6.8 km below 3 km, temp would be 200 degrees </SPAN>\n" );
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