Answer:
120 people/sq. mile
Step-by-step explanation:
Population Density is the concept of how "crowdy" a place is. The more the population density, the more crowded that place is.
The population density is found by dividing the "number of people" by the "land area" (in sq mile or sq km).
Here, it is given there are 600 million people, so
Number of People = 600,000,000
And, the land area is given as 5 million square miles, so
Land Area = 5,000,000 sq. miles
Hence,
Population Density = 600,000,000/5,000,000 = 120 people/sq. mile