Events A and B are given such that P(A)=7/10, P(A U B)=9/10 and P(A bigcap (upside down U) B)=3/10.

Find P(B) and P(B' bigcap (upside down U) A)

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.