Question: I want an explanation for this example : The Round-trip-time between the college and home for a student is normally distributed with a mean of

I want an explanation for this example :

The Round-trip-time between the college and home for a student is normally distributed with a mean of 47 minutes and a standard deviation of 4.6 minutes. To one-decimal place, what Round-trip-time would be considered the 70^th percentile? Express your answer correct to 2 decimal places and add the units (minutes). Leave one space between the number and the units.

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