This line is foreshadowing because it implies that anything -- even people -- that becomes a burden can easily be destroyed.
Later, when Beatty himself becomes a problem, Montag burns Beatty to death. When Montag killed Beatty, he destroyed the responsibility he owed him. In this way, this line is an element of foreshadowing.
She is comparing since she is looking at the different boxes and comparing the grams of sugar
So we know the bus can travel 2,160 miles in 36 hours
to find out how many hours the bus travels in an hour we simply divide the total miles given (2,160) by the total hours given (36)
2160 miles/36 hours = 60 miles
so the average distance the bus travels in 1 hour is 60 miles
