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The time to complete a standardized exam is normally distributed with a mean of 55.8 minutes...

The time to complete a standardized exam is normally distributed with a mean of 55.8 minutes and a standard deviation of 9.3 minutes. The designers of the exam want to set a time limit where only 14% of the people taking the exam do not finish. What should this time limit be?

Please explain where each number goes! I have to show full work!

Math   Statistics-And-Probability   
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