In 2000,39 countries in the periphery had rates of natural increase of 3.0 or more.This means that their populations are projected to double in about ________ or less.

Question

Quizplus · Accepted Answer

According to the rule of 70, a population will double in approximately 70 divided by the rate of natural increase. Therefore, a rate of natural increase of 3.0 would result in a doubling time of approximately 23.3 years (70/3=23.3). Therefore, option A is the correct answer.

In 2000,39 Countries in the Periphery Had Rates of Natural