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The population of the world in 1987 was 5 billion and the annual growth rate was estimated at 2 percent per year. Assuming that the world population follows an cxponential growth model, find the projected world population in 2015. Uses significant digits our final answer

Respuesta :

The poupation in the year 2015 can be calculated as,

[tex]P_{2015}=P_{1987}(n+r)^{2015-1987}[/tex]

Here,

[tex]\begin{gathered} P_{1987}=5\text{ billion} \\ n=1\text{ (per year)} \\ r=2(\text{rate)} \end{gathered}[/tex]

Therefore,

[tex]P_{2015}=5\times(1+2)^{28}=1.14\times10^{14}\text{ billion}[/tex]

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