Question 8 The following table gives the approximate amount of emissions, E. of nitrogen oxides in millions of metric tons per year in the US. Lett be the number of years since 1985 and E = f(t). 1985 1990 1995 2000 2005 2010 2015 2020 E 5.2 17.8 9.0 12.0 15.3 18.8 38.6 Year 9.8 35 Using right endpoints and 7 rectangles, estimate the integral f(t) dt . N You must enter the exact numerical decimal answer in reduced form