Please help!

I need help ordering this. I labeled each one so it would be easier to explain.

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error