In 1950, the use of coal in the US was 114.6 million tons. The use of coal has decreased by 6.6% per year since then. Estimate the amount of coal used in the US in 2010. Round to the nearest tenth of a million tons.
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Home » Mathematics » In 1950, the use of coal in the US was 114.6 million tons. The use of coal has decreased by 6.6% per year since then. Estimate the amount of coal used in the US in 2010. Round to the nearest tenth of a million tons.