2 questions i really need help with.

A ferris wheel has a radius of 80ft. Two particular cars are located such that the central angle between them is 165 deg. To the nearest tenth, what is the length of the intercepted arc between those two cars on the Ferris wheel?

A wave is modeled with the function y=1/2 sin 3θ. Describe the graph of this function, including its period, amplitude, and points of intersection with the x-axis.

Question

2 questions i really need help with. 

A ferris wheel has a radius of 80ft.  Two particular cars are located such that the central angle between them is 165 deg.  To the nearest tenth, what is the length of the intercepted arc between those two cars on the Ferris wheel?

A wave is modeled with the function y=1/2 sin 3θ.  Describe the graph of this function, including its period, amplitude, and points of intersection with the x-axis.