QUESTION 6 A flywheel is rotating at a speed of 1800 rev/min. When power is disconnected, the speed decreases exponentially at the rate of 32% per minute. What is the speed of flywheel after 10 minutes? O A. 83.6 rev/min O B. 78.4 rev/min O C. 63.9 rev/min O D. 70.8 rev/min O E. 73.4 rev/min