D)
2,500 people per square mile
Explanation:
To calculate density of a population;
Population Density = Number of People / Land Area
= 400,000 / 160
= 2, 500
= 2,500 people per square mile
Answer: 2,500 people per square mile
Population density is calculated by : Population / square miles
Therefore :
Population density = 400,000/160
= 2,500
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