The population density r miles from the center of a certain city is given by the function $D ( r ) = 2,000 e ^ { - r ^ { 2 } / 100 }$ people per square mile. How many people live within 10 miles of the city's center?

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The Answer of The population density r miles from the center of a certain city is given by the function $D ( r ) = 2,000 e ^ { - r ^ { 2 } / 100 }$ people per square mile. How many people live within 10 miles of the city's center?

The Population Density R Miles from the Center of a Certain