The mean snowfall in January in Mount Shasta, California is 29.9 inches. A)

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Suppose the amount of tar in cigarettes is described by a normal model with a mean of 3.5 mg and a standard deviation of 0.5 mg. b. In order to advertise as a low tar brand, a manufacturer must prove that their tar content is below the 25th percentile of the tar content distribution. Find the 25th percentile of the distribution of tar amounts.