In the year 2000, the population of a certain country was 277 million with an estimated growth rate of 0.5% per year. a. Based on these figures, find the doubling time and project the population in 2120. b. Suppose the actual growth rates are just 0.2 percentage points lower and higher than 0.5% per year (0.3% and 0.7%). What are the resulting doubling times and projected 2120 population?

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