Under current rules, the weight of a MLB baseball weights between 142 ?and 149 ?grams. One particular company which makes baseballs produces baseballs whose weights are approximately normally distributed, with mean of 145 ?grams and standard deviation of 1.38 ?grams. If the company wanted to identify the heaviest 3.5% ?of balls to remove prior to packaging, what is the most a ball could weigh to not be removed?


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