An expensive watch is powered by a 3-volt lithium battery expected to last 5 years. Suppose the life of the battery has a standard deviation of .6 year and is normally distributed Compute the...

An expensive watch is powered by a 3-volt lithium battery expected to last 5 years. Suppose the life of the battery has a standard deviation of .6 year and is normally distributed

Compute the length-of-life value for which 10% of the watch's batteries last longer .