Question: Replacement times for auto transmissions are normally distributed with a mean of 7.5 years and a standard deviation of 3.2 years. If the manufacturer wants

Replacement times for auto transmissions are normally distributed with a mean of 7.5 years and a standard deviation of 3.2 years. If the manufacturer wants to provide a warranty so that at most 17% of the transmissions will be replaced before the warranty expires, what is the time length of the warranty?

Round to the nearest tenth.

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