Derek on September 10, 2014
I am having a hard time with this one, it seems like the correct answer, C, is irrelevant because it does not give information about the future saving resulting from the thermo-thing. If they are absorbing some electricity from their own heat production, and this heat production would absorb and produce some electricity, and having more self-produced electricity would obviously lower the bill then we can assume eventually their bill would decrease, allowing them to pay off the expenses of the installation and begin to save money.
Melody on September 16, 2014
Kenji on September 5 at 05:50AM