Answer:
9.8 Inch
Step-by-step explanation:
The distance from the upper left corner to the bottom right corner of the box is the longest diagonal of the box.
For a rectangular prism:
Length of the Longest diagonal 
Therefore:
Length of the pencil

Answer:less than
Step-by-step explanation:
I have no clue whatsoever sorry
Answer:
P= 26
Step-by-step explanation: