(2/3)^2 without exponents

Which graph represents the following piecewise defined function?

Need ! 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?

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?