A straight road goes through the center of a circular city of radius 5 km.The density of the population at a distance r (in km)from the road is well approximated by $D(r)=30-4 r$ (in thousand people per km²).Find the total population of the city, to the nearest person.

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The Answer of A straight road goes through the center of a circular city of radius 5 km.The density of the population at a distance r (in km)from the road is well approximated by $D(r)=30-4 r$ (in thousand people per km²).Find the total population of the city, to the nearest person.

A Straight Road Goes Through the Center of a Circular D(r)=30−4rD(r)=30-4 rD(r)=30−4r

A Straight Road Goes Through the Center of a Circular $D(r)=30-4 r$