document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=84675>Question 84675</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321227735/algebrahomeworkh>Mathematics A Quantitative Reasoning Approach</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> For some reason these problems keep tripping me up...please help...Thanks!\r<BR>\n" );
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document.write( "Compact Flourescent Light Bulbs.<BR>\n" );
document.write( "You replace a 100-watt light bulb with a 25-watt compact fluorescent bulb.  Over a 10,000-hr life, how much energy, in kilowatt hours, do you save?  If electricity costs .08 cents per kilowatt-hour how much money do you save? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #60987 by </B><A HREF=/tutors/aboutme.mpl?userid=liz_gcmama><B>liz_gcmama(8)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=liz_gcmama><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=60987\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Compact Flourescent Light Bulbs.<BR>\n" );
document.write( "You replace a 100-watt light bulb with a 25-watt compact fluorescent bulb.  Over a 10,000-hr life, how much energy, in kilowatt hours, do you save?  If electricity costs .08 cents per kilowatt-hour how much money do you save?\r<BR>\n" );
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document.write( "1000watt-hours to the kilowatt-hour (that is, one kilowatt drawn constantly over the course of an hour)<BR>\n" );
document.write( "One 100 watt globe uses 0.1 kilowatt-hours per hour.<BR>\n" );
document.write( "One 25 watt globe uses 0.025 kilowatt-hours per hour.\r<BR>\n" );
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document.write( "In 10,000 hours, how much will each globe use?<BR>\n" );
document.write( "10000*0.1=1000  <BR>\n" );
document.write( "The 100 watt globe uses 1000 kilowatt-hours in its life.\r<BR>\n" );
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document.write( "10000*0.025=250<BR>\n" );
document.write( "The 25 watt globe uses 250 kilowatt-hours in its life.\r<BR>\n" );
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document.write( "1000-250=750.<BR>\n" );
document.write( "750 kilowatt-hours would be saved.\r<BR>\n" );
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document.write( "750*0.08=60<BR>\n" );
document.write( "Based on the information given, 60 cents would be saved.  However, I would guess that the amount is 8 cents or 0.08 dollars per kilowatt (a more realistic figure), giving the answer of 6000 cents or $60.00.\r<BR>\n" );
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