To calculate the population density, you can use the formula:
\[ \text{Population Density} = \frac{\text{Population}}{\text{Area}} \]
Using the provided numbers:
- Population: 39,292,355 people
- Area: 3,855,100 square miles
Now, substitute the values into the formula:
\[ \text{Population Density} = \frac{39,292,355}{3,855,100} \approx 10.2 \text{ people per square mile} \]
Based on this calculation, the closest correct answer from the provided responses is:
10 people per square mile.