Explain why the answer is 0.002?

The Earth's surface area is approximately

5.1 10⁸ km² (2 s.f.) and its population is

7.6 10⁹ (2 s.f.). Population densityis

the number of people per square kilometre.

Determine the population density of the

Earth assuming all the surface area is

habitable by humans.

About 30% of the Earth's surface is land,

including Antarctica. Determine the

population density of the earth assuming

that all the land is habitable, but not the

oceans.