To determine the population densities of Europe and the United States, we can use the formula for population density, which is:
\[ \text{Population Density} = \frac{\text{Population}}{\text{Land Area}} \]
For Europe:
- Population: 743.5 million = 743,500,000 people
- Land Area: 3.9 million square miles = 3,900,000 square miles
\[ \text{Density (Europe)} = \frac{743,500,000}{3,900,000} \approx 190.6 \text{ people per square mile} \]
For the United States:
- Population: 332.4 million = 332,400,000 people
- Land Area: 3.5 million square miles = 3,500,000 square miles
\[ \text{Density (USA)} = \frac{332,400,000}{3,500,000} \approx 95.0 \text{ people per square mile} \]
Conclusion:
- Europe has a population density of approximately 190.6 people per square mile.
- The United States has a population density of approximately 95.0 people per square mile.
Therefore, the correct comparison is:
Europe is more densely populated, with a density of 190.6 people per square mile.