Answer
During a media event at which Steve Jobs spoke, Apple shares dropped by an average of $0.10 per minute.
Work Step by Step
You take the end value 151.80 and subtract it from the end value 156.86 then divide by the time 50 minutes, and that gives you the amount of loss per minute.
Because (156.86-151.80)/50 = .1012 which rounds to 10 cents per minute.
