document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1182928>Question 1182928</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Imagine that the price per gallon of gas with a $7 car wash is $3.19 and the price without the car wash is $3.39.  When is it worth it to buy the car wash?  When is it worth it if the car wash costs $2? </SPAN>\n" );
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document.write( "The difference in the price per gallon is 20 cents.<br><BR>\n" );
document.write( "If the car wash costs $7, then the number of gallons of gas you need to buy to save $7 on the gas is $7/$0.20 = 35.<br><BR>\n" );
document.write( "So it is worth getting the car wash if you are buying 35 gallons or more of gas.<br><BR>\n" );
document.write( "If the car wash costs $2, then the number of gallons of gas you need to buy to save $2 on the gas is $2/$0.20 = 10.<br><BR>\n" );
document.write( "So it is worth getting the car wash if you are buying 10 gallons or more of gas.<br><BR>\n" );
document.write( " </SPAN>\n" );
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