The minute hand of a clock is 5.5 cm long. What is the average velocity for the tip of the hand during the interval form one hour to 20 minutes past the hour, expressed in a coordinate system with the y-axis toward noon and the x-axis toward 3 o'clock.
a. ( 0, -0.84 ) cm/min
b. ( 4.8 , -8.2 )...