1. Joe Speed's truck has wheels 36 inches in diameter. If the wheels are rotating at 630 rpm (revolutions per minute), find the truck's speed in miles per hour. Round your answer to two decimal places. (Hint: 1 mile = 63, 360 inches)

2. Sally Goes races on a bicycle with 13-inch radius wheels.When she is traveling at a speed of 44 ft/sec, how many revolutions per minute are her wheels making? Round your answer to two decimal places.

3. A wheel of radius 9 in. is rotating at the rate of 2400 rpm.

a. Find the exact angular speed in radians per minute. Give an exact answer

b. Find the linear speed of a point on the circumference in ft/min. Give an exact answer.