Answer: 432 inches
Step-by-step explanation:
Given : length of ribbon needed by Shannon for an art project = 9 feet
As we know : 1 feet = 12 inches
9 feet =

Thus if for 1 project , length of ribbon required is = 108 inches
For 4 projects , length of ribbon required is =

Thus 432 inches of ribbon should she buy if she is making 4 projects.