Over the past 50 years, Brazil's population growth rate has averaged about 2.3 percent. According to the rule of 70, Brazil's population will double in about ________ years.

Question

Quizplus · Accepted Answer

The rule of 70 is a way to estimate the number of years it takes for a quantity to double, given a constant annual percentage increase. To use it, you divide 70 by the annual growth rate. In this case, 70 divided by 2.3 equals approximately 30 years.

Over the Past 50 Years, Brazil's Population Growth Rate Has