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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!!^^

• maths -

(6.42)/(1.5 x 10^8)=4.3 x 10^-8???

I think so....

• maths -

Yeah..same as my answer sheet !thanks:)

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