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I have figured them all out except D On average, commuters in Phoenix, Arizona, area require m=...

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Basic Math

I have figured them all out except D

On average, commuters in Phoenix, Arizona, area requirem= 40.0 minutes to get to work.  Assume thetimes to get to work are normallydistributed with astandard deviation of s= 10 minutes, and that Joe is anaverage Phoenix resident.

  1. What is the probability that on any given day Joe will requireover 45 minutes to get to work?
  1. What is the probability it will take Joeexactly40.0 minutes to get to work on anygiven day?
  1. Joe has just left home from lunch to attend a meeting with theCEO in 30 minutes.  If the CEO routinely fires employeeswho are tardy for meetings, what is the probability the Joe willstill be employed tomorrow?
  1. Joe leaves home for work at exactly the sametime.  His work starts at 8:00 AM sharp.  Dueto traffic jams during the morning rush hour, Joe was tardy forwork on 38.2% of the time.  What time does Joe leave homefor work every morning?  Briefly explain your train ofthought in arriving to the answer.

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