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If f(x)= 3x+6 which of the following is the inverse of f(x)

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?