A ferris wheel 80 meters in diameter is boarded at its lowest
point (6 O'Clock) from a platform that is 10 meters above ground.
The wheel makes one full rotation every 20 minutes, and at time

(a) What is the period of the function

period =

(b) What is the midline of the function

(c) What is the amplitude of the function

amplitude =

(d) Consider the six possible graphs of

Which (if any) of the graphs A-F represents two full revolutions of the
ferris wheel described above?

A | B | C | ||

D | E | F |