Using the rule of 70,a population growth rate of 2% annually will result in doubling a population in 35 years.

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The rule of 70 states that to approximate the number of years it takes for a variable to double, divide 70 by the growth rate. Therefore, if the population growth rate is 2%, dividing 70 by 2 gives us 35 years. Hence, a population with a growth rate of 2% annually will double in 35 years.

Using the Rule of 70,a Population Growth Rate of 2