Solve problems concerning real-world situations using your knowledge of volume, surface area, and density.

Problem

About 70, percent of earth is covered in water, making 30, percent of earth potentially habitable by humans. Earth can be modeled as a sphere with diameter 12, comma, 700, space, k, m. There are 7, point, 1 billion people in the world.
What is the population density of potentially habitable earth?
Please choose from one of the following options.
Get 3 answers correct in a row