What is the midpoint between -9 and 15 on the number line?

12
2
3
6

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

This is different from the first one can someone me

Astudent survey asked: "how tall are you (in inches)? " here's the data: 67, 72, 73, 60, 65, 86, 72, 69, 74 give the five number summary. a. median: 73, mean: 70.89, iqr: 5, min: 60, max: 74 b. 60, 66, 72, 73.5, 86 c. 60, 67, 72, 73, 74 d. 0, 60, 70, 89, 74, 100