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Approximately what fraction of geologic time is represented by recorded history?
Wiki User
∙ 12y ago
5 billion is equal to 5000 million or 5x109 years. As such:
The fraction is 5000 / 5,000,000,000, which simplifies to:
5 / 5,000,000 and again to 1 / 1,000,000.
Therefore if Earth were 5 billion years old, and recorded history was 5000 years then recorded history would be one millionth of geological time.
It may be worth noting that 5 billion years is somewhat of an over estimate for the age of the Earth and that the current best estimate for Earth's age is 4.567 Billion years old.
Wiki User
∙ 14y ago
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