To calculate the population density, you can use the formula:
\[ \text{Population Density} = \frac{\text{Population}}{\text{Area}} \]
Given:
- Population = 748,814,048 people
- Area = 3,930,000 square miles
Now, substituting the values into the formula:
\[ \text{Population Density} = \frac{748,814,048}{3,930,000} \]
Calculating that:
\[ \text{Population Density} \approx 190.54 \text{ people per square mile} \]
So, the correct option is:
190.54 people per square mile