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 46 miles per hour and a standard deviation of

4 miles per hour. Find the percentage of vehicles passing through this construction

zone that are

a) exceeding the posted speed limit,

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