To find population density, it is population / area.
The population is 6688, divided by the area of 16.
6688/16 = 418
So the population density is 418 people per sq mile.
33.56 plus 41.98 = 75.54(total reading time for Hector)
31.61 plus 42.08= 73.69(total reading time of Liam)
75.54 minus 73.69= 1.85 more reading time than Liam
ANSWER:Hector read for 1.85 more minutes than Liam