nows what is correct or incorrect for the work you have completed so far. It does not indicate completi The mean useful life of car batteries is 48 months. They have a standard deviation of 3. Assume the useful life of batteries is normally distributed. a. Calculate the percent of batteries with a useful life of less than 45 months. (Round your answer to the nearest tenth percent.) b. Calculate the percent of batteries that will last longer than 54 months. (Round your answer to the nearest tenth percent.) X Answer is complete but not entirely correct. a. Percent of batteries 15.9 X % b. Percent of batteries 1.6 X