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A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard

A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard deviation of 10 thousand miles.

If the standard deviation is 7 thousand miles, the number of miles traveled by at least 70 % of the truck's miles is?

(Round to the nearest mile as needed.)

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