Convert 21 ft 9 in into yards feet and inches

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?