Please someone help. I am in need of a response... 
 The population of a major U.S. city is 8,550,405. The land area of the city is 1213.4 km².
 What is the best approximate population density of the city?
 7047 peoplekm2
 7124  peoplekm2 
 7167  peoplekm2 
 7500  peoplekm2