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The population of the U.S. grew by 29% between 1979 and 2004, during w [#permalink]
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The share of each energy source in total consumption is the same as the share of each energy source in per capita consumption.

For example, coal consumption accounts for 0.27 of the total energy consumption, so coal also accounts for 0.27 of the per capita energy consumption. So the total per capita energy consumption in 1979 is 25/0.27=92.59 2004 doubled 185.18

In 2004, coal per capita was 62.96, ng per capita was 61.11, and oil per capita was 31.48.

Finally, ask which number is in the range of these three numbers, CDE.

The 29% population growth in this question is redundant data.
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