An encyclopedia has 30 volumes. The total weight of these volumes is 71 and 1/4 pounds. Find the average weight of a volume

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Ahigh school has 3636 players on the football team. the summary of the players' weights is given in the box plot. approximately, what is the percentage of players weighing less than or equal to 225225 pounds?

What is the difference between the points (4, 7) and (4, -5)? a. 0 units b. 2 units c. 4 units d. 12 units