If it were discovered that the value of imports shown for 2007 was incorrect and should have been $5 billion instead, then the average (arithmetic mean) value of imports per year for the 10 years shown would have been approximately how much less?
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Three factory employees work at constant rates to produce DVDs. Employee A produces y DVDs in $$\frac{2}{5}$$ of an hour. Employee B produces y DVDs in $$\frac{3}{5}$$of an hour. Employee C produces y DVDs in $$\frac{5}{4}$$ of an hour. Which of the following combinations of employees can produce at least 5y DVDs in 2 hours? Indicate all such statements.
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