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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.3...

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.3 years, and standard deviation of 2.4 years. The 10% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place.

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TOPIC:Normal distribution.

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