The following table gives the the approximate amount of

Last updated: 4/25/2023

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 t be the number of years since 1940 and E f t a Using left endpoints estimate the integral f t dt z b Using right endpoints estimate the integral 1 f f t dt 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 t 1940 1950 E 1960 1970 1980 1990 7 4 9 3 13 3 18 1 21 3 19 6