Answer: 2 ft
Step-by-step explanation:
Given
Ellen has 20 ft of ribbon
She uses 12 ft of ribbon to make pillow
The amount of remaining ribbon is [tex]20-12=8\ ft[/tex]
She gives one-fourth of the remaining to her friend i.e
[tex]\Rightarrow \dfrac{1}{4}\times 8=2\ ft[/tex]
So, she give 2 ft of ribbon to her friend.