If a town with a population of 10,000 doubles in size every 17 years, what will the population be 68 years from now?
If the town doubles in size every 17 years, it will double 4 times in 68 years (68 / 17 = 4).
So, the population will double from 10,000 to 20,000 after 17 years, then to 40,000 after another 17 years, then to 80,000 after another 17 years, and finally to 160,000 after another 17 years.
Therefore, the population will be 160,000 68 years from now.