Answer:
[tex]\boxed{\text{R. 6 lb}}\\[/tex]
Step-by-step explanation:
In 1 day the cafeteria uses ¾ lb of butter.
In 8 days the cafeteria uses 8 × ¾ lb of butter.
Cancel the 4s.
8 × ¾ = 2 × 3
Multiply the numbers
2 × 3 = 6 lb
[tex]\boxed{ \textbf{The cafeteria uses 6 lb of butter.}}\\[/tex]
