Homework Help: Science

Posted by ALisha on Monday, September 15, 2008 at 6:16pm.

what is different about the it took the world population to double from 1 billion to 2 billion ad the time it took to double from 2 billion to 4 billion?

Science - Ms. Sue, Monday, September 15, 2008 at 6:27pm
How many years did it take to double from 1 billion?

How many years did it take to double from 2 billion?

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