Posted by **ashley** on Saturday, January 11, 2014 at 11:02pm.

The total population of the earth was estimated to be 6.42 billion people.Given that the total land surface area of the earth is about 1.5×10^8km^2.Find the average number of people living in 1 km^2 of land on earth,correct to 2 significant figures.Thanks a lot for helping me!!^^

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