If you want to know how many different ways a science fair could award gold, silver or bronze medals.
Would this be considered a permutation or a combination?

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

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.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)