A helicopter has a length of 15.2m is 1000 larger than is model What is the length of the model helicopter? Help

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

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

3.4a=57.8 what is the the value of a