Answer:
15.2 people per square kilometer.
Step-by-step explanation:
We have been given that in 2018, there is an average of 45.6 people per 3 square kilometers in the United States.
To find the number of people living in 1 square kilometer we will divide 45.6 by 3.
[tex]\text{Number of people living in 1 square kilometer}=\frac{45.6}{3}[/tex]
[tex]\text{Number of people living in 1 square kilometer}=15.2[/tex]
Therefore, 15.2 people will live in 1 square kilometer.