(Answered) An executive drives from his home to his office in the city

Statistics

An executive drives from his home to his office in the city. The driving times are normally distributed with a mean of 35 minutes and a standard deviation of 8 minutes.

In what percent of the days will it take him 30 minutes or less to drive to work?
In what percent of teh days will it take 40 minutes or more to drive to work?
How long will the longest 10 percent of the trips take?

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