The mean cost of domestic airfares in the United States rose to an all-time high of $385 per ticket. Assume domestic airfares are normally distributed with a standard deviation of $110. (1) What is the probability that a domestic airfare is $550 or more? 2) What is the probability that a domestic airfare is $250 or less? 3) What is the probability that a domestic airfare is between $300 and $500? 0.6325 (4) What is the cost for the 3% highest domestic airfares?

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