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(1 pt) The following table gives the the approximate amount of emissions, E, of nitrogen oxides in millions of metric tons per year in the US. Let I be the number of years since 1940 and
E = f(t).
1940 1950 1960 1970 1960 1990
1 0 10 20 30 40 50
E 6.7 13.1 18.1 20.9 19.6|
Estimate the integral://(Odt
Be sure that you know what the units of your answer are, and what its meaning is!
(Original data from the Statistical Abstract of the US, 1992)
9
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