PLEASE SHOW WORK Sand leaks at 36 cubic meters/sec into a cone shaped pile that had a radius always equal to the height. When the radius is 3 meters, at what rate (in m/sec) is the height changing?

A. 3/pi
B. 2/pi
C. 4/pi
D. 1/pi
E. 8/pi

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes