A man stands 200 meters south of a signal. He uses a pair of binoculars to observe a car moving at 25 meters per second. When the car is 45 meters away from the signal, at what rate is the angle of the binoculars changing at that instant? A.
0.01 rad/s
B.
0.09 rad/s
C.
0.11897 rad/s
D.
0.219 rad/s

To keep cylindrical tanks from tipping over, a designer is planning to enlarge the original area of the base by 50%. the new tank should have the same volume as the original. how should the designer change the height of the tank? a: make it 50% taller than the height of the original tank. b: make it 6623% taller than the height of the original tank c: make it 3313% shorter than the height of the original tank d: make it 50% shorter than the height of the original tank.