A rectangular cardboard has dimensions as shown. The length of the cardboard can be found by dividing its area by its width. What is the length of the cardboard in inches? Rectangle with width labeled on the right, width equals 3 1/4 inches. Below the rectangle, it says, length equals? Inside the rectangle, it says, area equals 21 2/3 square inches.

5 1 /12
6 2/3
18 5/12
56 1/3

Please help!!

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references. the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources