Question

In 2020, the population growth rate of Senegal was 2.31%. The doubling time for the population of Senegal would be:

a) 3 years
b) 10 years
c) 30 years
d) 7 years

Answer 1

Using the Rule of 70, the doubling time for Senegal's population with a 2.31% growth rate is approximately 30.3 years, so the closest answer is 30 years.

Step-by-step explanation:

The population growth rate of Senegal in 2020 was 2.31%. To calculate the doubling time of a population based on its growth rate, we can use the Rule of 70, which is a shortcut to estimate the number of years it will take for a certain variable to double. The formula states that the doubling time in years is approximately equal to 70 divided by the annual growth rate.

In this case, we would divide 70 by the growth rate of Senegal, which is 2.31%:

Doubling time = 70 / 2.31 = 30.3 years.

Therefore, the closest answer would be c) 30 years.