A country has population of 350 million and an annual growth rate of population 2.0% at t = 0. There after the population stabilizes at 1.4 billion. How long it will take for the population to reach 0.7 billion?
1
∼ 41.2 years
2
∼ 17.9 years
3
∼ 5 years
4
∼ 35.0 years