Question

Starting from a 20132013 population of 7.17.1 billion, use the given growth rate to find the approximate doubling time (use the rule of 7070) and to predict world population in 20502050.

Use the average annual growth rate between 19501950 and 20002000, which was about 1.8%1.8 \%.

Solution

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Answered 1 year ago
Answered 1 year ago
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Using the approximate doubling time formula

T double=70PT_{\text{~double}}=\dfrac{70}{P}

we obtain

T double=701.8=39 yearsT_{\text{~double}}=\dfrac{70}{1.8}=39\text{~years}

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