What is the area of this composite shape?

Can someone me i’m confused. will give brainliest and a whole bunch of points

Measures of the angle of r, 31 s (x+4) t (3x+9)

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.