Find the interquartile range for a data set having the five-number summary: 3.5, 12, 19.1, 25.8, 31.8

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid