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please help me with this question (Normal Distribution, and Converting to z Question) The mean weight of a facial cream jar filled by a machine

please help me with this question

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(Normal Distribution, and Converting to z Question) The mean weight of a facial cream jar filled by a machine is 15.0 oz with a standard deviation of .4 oz. If the weights of all the jars filled by the machine are normally distributed, what percent of the jars will weigh between 14.9 and 16.2 oz? Write your answers as whole percentage

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