1. A satellite in circular orbit 1250 kilometers above Earth makes one complete revolution every 110 minutes. Assuming that Earth is a sphere of radius 6400 kilometers, what is the linear speed (in kilometers per minute) of the satellite?
2. A car moves at a rate of 65 miles per hour, and the diameter of its wheels is 2.5 feet.
(a) Find the number of revolutions per minute the wheels are rotating.
(b) Find the angular speed of the wheels in radians per minute.