Charlie goal is to use less 50 gallons of water per day. his water bill for the month showed 1,524 gallons of water in 30 days. did charlie meet his goal this month ?

Pls i’m too dumb to know what i’m doing right now

Which of the following contains a variable?

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?