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The average price of coal used for electricity production during 2018 was $40 per short ton...

The average price of coal used for electricity production during 2018 was $40 per short ton (2000 lbs). Assuming this coal has a heat of combustion of 30 ??/?? please answer the following two questions.

How much energy does one short ton of coal deliver in ???

What is the cost of energy from this coal in $/???

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