Advanced Placement (AP) High School

Crude birth rate 38/1,000 individuals
Crude death rate 24/1,000 individuals
Net migration rate 2/1,000 individuals
(i) Calculate the national population growth rate for country X. Show your work.

(ii) Using the rule of 70, calculate the doubling time for this population.

Answers

Answer 1

Answer:

40-24 = 1616/1000 = 0.016 x 100 = 1.6% growth rate

70/1.6 = 43.75 years = doubling time.

Answer 2

The national population growth rate for country X is 1.6%

Crude birth rate = 38/1,000 individuals

Crude death rate = 24/1,000 individuals

Net migration rate = 2/1,000 individuals

The national population growth rate for country X will be:

= [(38 + 2) - 24] / 1000

= 16/1000

= 0.016

= 1.6% growth rate.

Using the rule of 70, the doubling time for this population will be:

= 70/1.6

= 43.75 years

Therefore, the doubling time for this population is 43.75 years.

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