What is 6 + 7* log of base 2 = 21

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

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?