Question 21.84

54. (Adapted from Terence Blows, Northern Arizona University.) Classify as in Exercise 53, but for the following circumstances.

  1. The mean concentration of carbon dioxide in the atmosphere increases by 2 ppm per year.
  2. The mean concentration of carbon dioxide in the atmosphere increases 0.5% per year.
  3. Your knowledge of mathematics and its applications increases with each section of this book that you study.
  4. The number of people in the world increases by 1.2% per year.