Answer:
With one new spool of ribbon containing 30 1/2 feet Sarah can wrap 11 medium boxes using 2 3/4 feet of ribbon on each.
I hope this answers your question as there was not a specific question
Explanation:
30 1/2 feet of ribbon= 366 inches of ribbon
2 3/4 feet of ribbon= 33 inches of ribbon
33/366=11.09