Consider the following statistic.As of January 2009, the USA has produced 60,000 metric tons of nuclear waste in 60 years of operating 104 nuclear power plants.On average, how much waste is produced by each plant on a monthly basis?

There are 60 years × 12 months = 720 months. Across 104 plants, that is 104 × 720 = 74,880 plant-months. Dividing 60,000 metric tons by 74,880 gives about 0.8 tons per plant per month, so the correct choice is A, 0.8 tons per month.

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