Can someone fully answer this question? could I get verified help if not that's ok

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(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

Select the number of ways in which a line and a circle can intersect