Scientists Use the Rule of 707070 to Calculate Human Population Growth

Explanation

The rule of 70 is used to find the approximate doubling time in years. The rule of 70 uses the equation 70 divided by the growth rate per year. In this case, with a population growth rate of 10%, the calculation would be 70/10 = 7. This means that the population would double in 7 years.

Therefore, for a nation with a population growth rate of 10% per year, the doubling time would be 7 years.

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