The equation total # of people in an area/(land) area in km2(or mi2) is used to calculate
a.
growth rate
b.
population density
c.
death rate
d.
carrying capacity

The correct option is: B. population density    

Explanation:

Population density is defined as the population per unit area, which can be calculated for the entire world or a given country, village, district, city, etc. It can be expressed as the ratio of the aggregate population and the complete land area. The total land area is measured in km² or sq. mi.

Therefore, the unit of population density is per km² or per sq. mi.

this is true

explanation: