The length of time it takes to groom a dog at Shaggy's Pet Shoppe is normally distributed a mean of 45 minutes and a standard deviation of 10 minutes. What is the probability that a dog takes more than 60 minutes to groom? What is the probability that a dog takes less than 30 minutes to groom? What is the probability that a dog takes between 20 minutes and 60 minutes to groom?

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