Which is the standard form for this number? (9 x 10) + (3 x 1) + (5 x 1 10 ) + (6 x 1 1,000 )

What is the inverse of the function f(x)=4x+8

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 somebody me with this radical simplification?