What is the theoretical probability a fair coin will land on tails?

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

Could someone with number 1 and 2

Which of the following represents the factorization of the trinomial below? x^2+7x-30