A waterwheel has a radius of 5 feet. The center of the wheel is 2 feet above the waterline. You notice a white mark at the top of the wheel. How many radians would the wheel have to rotate for the white mark to be 3 feet below the waterline?

2 pi radians
StartFraction 3 pi Over 2 EndFraction radians
Pi radians
StartFraction pi over 2 EndFraction radians