A mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 25,000 miles and a standard devialloh of 2100 miles. He wants to give a guarantee for free replacement of tires that don't wear well. How should he word his guarantee if he is willing to replace approximately 10% of the tires? Click to view page 1 of the table Click to view page 2 of the table Tires that wear out by miles will be replaced free of charge. (Round to the nearest mile as needed.)

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