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3 June, 21:27

In 1990, people in the United States spent $52.9 billion on video and audio products. In 2000, people spent $106.9 billion on video and audio products. What was the rate of change?

A. $54 billion per year

B. $5.4 billion per year

C. $540 billion per year

D. $54 million per year

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  1. 4 June, 00:20
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    B. 5.4 billion per year
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