Jason worked on his reading project for 5 nights. He worked 2/3 hour each night. How many hours did he work on his project during the 5 nights?

How do you find principle and simple interest

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 data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81