The hypothetical island country of Gilder lies in the Mediterranean Sea off the coast of France. Demographers have studied Gilder for the past 50 years. At the beginning of the study, Gilder had a population of 20 million. The demographers have measured birth and death numbers, as well as immigration and emigration numbers, as shown in the data table. From the data, Calculate the population of Gilder for each 10-year period by filling in the Population (NO) and Population (Nt) columns in the data table. Use this formula to do your calculations: Population size: Nt = No + (B + I) – (D + E)initial population = 20,000,000

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Answer:

Year 10 - No = 20,000,000 : Nt = 20,820,000

Year 20 - No = 20,820,000 : Nt = 22,000,000

Year 30 - No = 22,000,000 : Nt = 23,735,000

Year 40 - No = 23,735,000 : Nt = 25,843,000

Year 50 - No = 25,843,000 : Nt = 28,183,000

Given, initial population = 20,000,000. So, we can measure population size by  population geometric growth model:

Nt = No + (B + I) – (D + E)

What is Population?

Population is defined as the inhabitants of a particular area, town, or country.

Whereas, B is birth rate,

D: death rate of population

I : immigration of population

E:  Emigration of population

Nt: population size during time intervel

No: Initial population size,

Year 10 - No = 20,000,000 : Nt = 20,820,000

Year 20 - No = 20,820,000 : Nt = 22,000,000

Year 30 - No = 22,000,000 : Nt = 23,735,000

Year 40 - No = 23,735,000 : Nt = 25,843,000

Year 50 - No = 25,843,000 : Nt = 28,183,000

Conclusion, after the 50 years  (Nt) the population size will be 28,183,000.

For more detail regarding population growth model, visit:

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