Question: a construction zone on a highway has a posted speed limit of 40 miles per hour. The speeds of vehicles passing through this construction zone

a construction zone on a highway has a posted speed limit of 40 miles per hour. The speeds of vehicles passing through this construction zone are normally distributed with a mean of 42 miles per hour and a standard deviation of 3 miles per hour/ Find the percentage of vehicles passing through this construction zone that are exceeding the posted speed limit.

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