Allie made the line plot below to show the length of strings she cut for her art project. What is the difference in the length between the length of string she used most often and the length of strings she used least often

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.