A person goes up a set of stairs and boards the bottom of a ferris wheel At t 0 seconds the ferris wheel starting turning and the height of the rider above the ground in feet is given by h t 32 20 cos nt 45 a What is the radius of the ferris wheel feet b How long does the ferris wheel take to make one revolution 3 c When does the rider first reach a height of 27 feet Give your answer to the nearest second seconds at about seconds