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According to modern science.earth is 4.5 billion yrs old and written human history extends about 10,000 yrs back. Suppose the entire history of earth is represented with a 1000 meter long timeline, with the birth of earth on one end and today on the other. What distance represents 2 billion years? How far from the end of the timeline does written history begin?

Sagot :

There is 1000m to represent 4.5billion years.This means 1m represents (4500,000,000/1000) 4,500,000 years.
For 2 billion years: 2,000,000,000/4,500,000=444.44m
Written history: 10,000/4,500,000=0.0022m from the end.
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