Question: Optimal-Eats blenderhas a mean time before failure of40 months with a standard deviation of6 months, and the failure times are normally distributed. What should be

Optimal-Eats blenderhas a mean time before failure of40 months with a standard deviation of6 months, and the failure times are normally distributed. What should be the warranty period, in months, so that the manufacturer will not have more than10% of theblenders returned? Round your answer down to the nearest whole number.

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