18. Population density is the number of peopleper unit of area. The population densityof a certain region is 60 people per squarekilometer. If the region covers 23 squarekilometers, what is the population ofthe region?
[tex]\begin{gathered} \text{population density=}\frac{\text{ number of people}}{\text{area occupied}} \\ \text{population density = 60people per km}^2 \\ \text{area occupied=23 km}^2 \\ \text{Number of people(population of the region)=60}\times23 \\ \text{Number of people(population of the region)=}1380\text{ people} \end{gathered}[/tex]
