Use circle below for questions 1-14 radius diameter

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.

Can someone me out here and the tell me the greatest common factor

Ten times the square of a non-zero number is eqaul to ninety times the number