C. Using India’s rate of natural increase shown in the table, describe how to calculate the doubling time of India’s population

Doubling time of India’s population can be calculated by dividing 70 years by the  rate of natural increase percentage.

Note that the rate of natural increase percentage was given in the population statistics for India 2018.

Hence:

Doubling time of India's population can be calculated using this formula

India's Doubling time=70 years/ Percentage of rate of natural increase

Where:

Rate of natural increase=1.4%

Let plug in the formula

India's Doubling time=70 years/1.4%

India's Doubling time=50 years

Inconclusion Doubling time of India’s population can be calculated by dividing 70 years by the  rate of natural increase percentage.

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Explanation:

The increase rate of population is described by the following ordinary differential equation is:

Where is the time constant. The solution of the differential equation is:

The time constant in years is found by substituting known variables:

The doubling time is: