Evaluate t-7 for t =20

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

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?