The Lisbons' new heat pump cost $4,500.They bought it to replace their old furnace and air conditioner which cost about $2,800 a year to run.The heat pump will save them approximately 39% a year.In how many years will the heat pump pay for itself? Round to the nearest tenth.

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Vincent Machi · Accepted Answer

Final Answer : 4.1 years;2,800    0.39 = 1,092;4,500 ÷ 1,092 ≈ 4.1

The Lisbons' new heat pump cost $4,500.They bought it to replace their old furnace and air conditioner which cost about $2,800 a year to run.The heat pump will save them approximately 39% a year.In how many years will the heat pump pay for itself? Round to the nearest tenth.

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