Help please :))) thanks!

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.

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

See attachment below and find the equivalent of tan(∠qsr)