According to modern science Earth is about 4.5 billion years old and written hum

Question

According to modern science Earth is about 4.5 billion years old and written human history extends back about 10.000 years Suppose the entire history of Earth is represented with a 100-meter-long timeline, with the birth of Earth on one end and today at the other end a. What distance represents 4 billion years'? b. How far from the end of the 4 timeline does written human history begin? a. billion years is represented by 88 8 meters of the timeline b. Written human history begins about [] millimeters from the end of the timeline

Explanation / Answer

The end of the timeline is 100 mts which is 4.5 billion years

Take 100 m = 4.5 billion years

1 year = 100/(10^9)= 1e7 m

Then as the human history began 10000 years ago the distance is = 1e-3 m

It's distance from the end is 100 - (1^-3)= 99.999m= 99999mm

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