Guys i cant solve what is the radius of 28

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

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?

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74