The answer is 15 km I think.
A is the answer. This is because 605/55=w which is the same as
55 x w =605
Salad and pbj: 24 students
Turkey sandwich and school lunch: 30 students
30
-
24
---------
6
Any positive number is always bigger than any negative number.
positive 5 is bigger than -3.5
We need the actual data set to do anything