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Natural gas is often priced in units of dollars per therm. One therm equals 100,000 BTUs. A certain family uses 600 therms of energy to heat its home annually using a natural gas furnace that is 80 percent efficient. The family is considering replacing its current furnace with one that is 96 percent efficient. Assuming the cost of a therm is $0.30, which of the following would be the family's annual savings in the cost of home heating?

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