1 billion 2 billion 3 billion 4 billion 5 billion 6 billion 7 billion

July 27, 2026Mathematics

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Step-by-step solution

4 steps

Thanks for providing the specific data points, Tshiamo! Let's recalculate using these figures.

A) one billion to two billion

Identify the years from your data.
Population reached one billion in 1830.
Population reached two billion in 1939.
Calculate the difference in years.
$1939 - 1830 = \boxed{\text{109 years}}$
B) two billion to four billion
Identify the years from your data.
Population reached two billion in 1939.
Population reached four billion in 1975.
Calculate the difference in years.
$1975 - 1939 = \boxed{\text{36 years}}$

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