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Over the last 50 years the population has doubled. Today the world population is 7 billion people. What is the average rate of change of the worlds population?

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Answer:

  • 70000000 (70 million people per year)

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Average rate of change for this case is:

  • r = difference in the population / time range
  • r = (7 000000000 - 3 500000000)/50 = 70000000
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