The following table gives the emissions, E, of nitrogen oxides in millions of metric tons per year in a country. Let t be the number of years since 1970 and E = f(t). Year 1970 1975 1980 1985 1990 1995 2000 E 26.9 26.2 27.3 25.8 25.2 25.2 22.8 30 (a) What are the units and meaning of f(t)dt? The units are The integral represents the average emissions of nitrogen oxides during the period 1970 to 2000. total emissions of nitrogen oxides during the period 1970 to 2000. net change in emissions of nitrogen oxides during the period 1970 to 2000. rate of change of emissions of nitrogen oxides during the period 1970 to 2000. eTextbook and Media

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.