document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1010379>Question 1010379</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It is expected that 563 quadrillion thermal units of Btu (British thermal units) of energy will be consumed worldwide in 2015. In 2003, worldwide consumption was 421 quadrillion Btu. What is the expected rate of change in consumption from 2003 to 2015. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #629348 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=629348\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's subtract the two amounts and then divide by the twelve years to find the average increase (rate of change)...<BR>\n" );
document.write( "(563 - 421)/12 = 11.83 quadrillion BTU/yr </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );