At southside middle school, 20% of the students play an instrument. there are 305 students. how many students play an instrument?

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

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

Can someone check if i did this correct. it’s number 4 if you’re wondering.