Please I need answers for this!!

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.

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

Factor and solve to find roots x squared -x - 90 =0