Question 23.49

19. We continue the ideas of Exercises 17 and 18, but with a more radical hypothesis.

  1. How long would the 100-year supply last if we reduced our consumption by just 0.5% per year—that is, if we used 0.5% less each year instead of 2.5% more?
  2. How long would it last if we used 1% less each year?

19.

(a) 139 years

(b) Forever!