A customer service firm receives an average of three calls per hour on its toll-free number. For any given hour, find the probability that it will receive at least three calls.

You are the cfo of a u. s. firm whose wholly owned subsidiary in mexico manufactures component parts for your u. s. assembly operations. the subsidiary has been financed by bank borrowings in the united states. one of your analysts told you that the mexican peso is expected to depreciate by 30 percent against the dollar on the foreign exchange markets over the next year. what actions, if any, should you take