The correct answer is All of these answers are correct.
(Think Through Math Only)
I don't think I need to explain why.
These are very simple.
All of these answers are correct ✔
r > number of rolls
x> feet of wrapping paper needs
we know that
1 r > 12 feet of wrapping paper
r=(1/12)*x > equation required
for x=84 feet of wrapping paper