PLEASE HELP 3 MORE!! images below

Convert 16 yards to feet use the conversion rate 3 feet = 1 yard

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

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5