Statement 1: Population density is the number of people living in a unit area of the earth's surface.
Statement 2: Population density is usually expressed per square mile.
1
Statement 1 is true, Statement 2 is true
2
Statement 1 is true, Statement 2 is false
3
Statement 1 is false, Statement 2 is true
4
Statement 1 is false, Statement 2 is false