What is the meaning of the slope of the line

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

How do you find the circumfrance of a circle?

If chord ab is congruent to chord cd, then what must be true about ef and eg?