The population of a major U.S. city is 8,550,405. The land area of the city is 1213.4 square kilometers. What is the best approximate population density of the city? 7047 peoplekm2 7124 ​ peoplekm2 ​ 7167 ​ peoplekm2 ​ 7500 ​ peoplekm2 ​