Help me on this thats all i ask for this app so i can enjoy my weekend

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.

Plz hurry evaluate the expression a+b where a=8 and b=19

What is the circumference of a circle with an area of 50.24 cm²?