The land area of the coastal city can be found by subtracting the area of the water from the total area of the coastal city; that is, 92.1−11.3=80.8 square miles. The population density is the population divided by the land area, or
621,000
80.8
=7,685 which is closest to 7,690 people per square mile. Choice A is incorrect and may be the result of dividing the population by the total area, instead of the land area. Choice C is incorrect and may be the result of dividing the population by the area of water. Choice D is incorrect and may be the result of making a computational error with the decimal place.