The bar graph shows the total amount Americans paid in federal taxes, in trillions of doll...

The bar graph shows the total amount Americans paid in federal taxes, in trillions of dollars, and the U.S. population, in millions, from 2007 through 2010. Exercise are based on the numbers displayed by the graph.

a. In 2009, the United States government collected $2.20 trillion in taxes. Express this number in scientific notation.

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b. In 2009, the population of the United States was approximately 308 million. Express this number in scientific notation.

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c. Use your scientific notation answers from parts (a) and (b) to answer this question: If the total 2009 tax collections were evenly divided among all Americans, how much would each citizen pay? Express the answer in decimal notation, rounded to the nearest dollar.