To determine the correct population densities for Europe and the United States, we can calculate the densities using the given population and land areas.
Population density formula: \[ \text{Population Density} = \frac{\text{Population}}{\text{Land Area}} \]
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For Europe:
- Population: 743.5 million people
- Land area: 3.9 million square miles
\[ \text{Density of Europe} = \frac{743,500,000}{3,900,000} \approx 190.6 \text{ people per square mile} \]
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For the United States:
- Population: 332.4 million people
- Land area: 3.5 million square miles
\[ \text{Density of the USA} = \frac{332,400,000}{3,500,000} \approx 95.0 \text{ people per square mile} \]
Now, let's compare the densities:
- Europe: approximately 190.6 people per square mile
- USA: approximately 95.0 people per square mile
Thus, Europe is more densely populated than the USA.
The correct answer is: Europe is more densely populated, with a density of 190.6 people per square mile.