The data set shows the ages of the members of a book club. what is the shape of the distribution of this data set?

19, 21, 18, 19, 16, 21, 20, 17, 16, 17, 20, 18

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

What is the interquartile range of this day at set?