Assume that man's recorded history can be stretched back to 4600 years before the present.This is approximately what fraction of geologic time?
A)one ten-thousandth
B)one millionth
C)one billionth
D)one hundred-thousandth

Question

Quizplus · Accepted Answer

Assuming present day is 2021, 4600 years before the present is 2021-4600= -2579. This is a tiny fraction of geologic time, which is estimated to be around 4.6 billion years. Therefore, the best choice is B) one millionth, which is 4.6 billion divided by 4600.

Assume That Man's Recorded History Can Be Stretched Back to 4600