# The world population in 2016 was estimated to be 7.4 billion people, and increasing about 1.1% per year.

The world population in 2016 was estimated to be 7.4 billion people, and increasing about 1.1% per year. Assume that this percentage growth rate remains constant through 2020.What would you expect the population to be in 2020?

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Raheem Donnelly
Population in 2016 = 7.4 billion
Population in 2017 $$\displaystyle={7.4}\times\frac{{{100}+{1.1}}}{{100}}$$, so
Population in 2020 $$\displaystyle={7.4}\times\frac{{\left({100}+{1.1}\right)}^{{4}}}{{100}^{{4}}}=$$
$$\displaystyle={7.4}\times{1.011}^{{4}}={7.73}$$ billion