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The following table gives the total world emissions of CO2 from fossil fuels, in
Chapter 5, Problem 28(choose chapter or problem)
The following table gives the total world emissions of CO2 from fossil fuels, in billions of tons per year.3 Year 1981 1986 1991 1996 2001 2006 2011 CO2 (bn tons per year) 20.1 21.3 21.9 23.4 24.2 29.1 34.7 (a) Use this data to estimate the total world CO2 emissions between 1981 and 2011 using a left sum with n = 6. (b) Is your answer in part (a) an upper or lower estimate? How can you tell? (c) Use this data to estimate the total world CO2 emissions between 1981 and 2011 using a right sum with n = 3. (d) Is your answer in part (c) an upper or lower estimate? How can you tell?
Questions & Answers
QUESTION:
The following table gives the total world emissions of CO2 from fossil fuels, in billions of tons per year.3 Year 1981 1986 1991 1996 2001 2006 2011 CO2 (bn tons per year) 20.1 21.3 21.9 23.4 24.2 29.1 34.7 (a) Use this data to estimate the total world CO2 emissions between 1981 and 2011 using a left sum with n = 6. (b) Is your answer in part (a) an upper or lower estimate? How can you tell? (c) Use this data to estimate the total world CO2 emissions between 1981 and 2011 using a right sum with n = 3. (d) Is your answer in part (c) an upper or lower estimate? How can you tell?
ANSWER:(a) Upper estimate: 20.1 + 21.3 + 21.9 + 23.4 + 24.2 + 29.1 + 34.7 = 144.8 billion tons CO2
(b) This is an upper estimate, because it is the sum of all the emissions from all the