What is a This is a fraction or a decimal that repeats called?

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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

Ineed in figuring out this problem.