Aline with a slope of -1 and passes through (0, 4)

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable

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?

Ethan purchased a container of sports drink that contains 300 calories. the label says that 80% of the calories are from carbohydrates. how many calories are from carbohydrates?