A manufacturer knows that their items have a normally distributed lifespan, with a mean of 15 years, and a standard deviation of 3.9 years. The 3% of items with the shortest lifespan will last less...

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 15 years, and a standard deviation of 3.9 years.


The 3% of items with the shortest lifespan will last less than how many years?


Give your answer to one decimal place.