which represents a unit rate?\nthe cost of cat food is $36 per 3 bags.\nthe cost of orange juice is $3 per…

Explanation:

Step1: Recall unit - rate definition

A unit rate is a rate where the second quantity is 1.

Step2: Analyze each option

• For “The cost of cat food is $36 per 3 bags”, the rate is $\frac{36}{3}=12$ dollars per bag, not a unit - rate as the denominator is 3.
• For “The cost of orange juice is $3 per jug”, the rate is $\frac{3}{1}=3$ dollars per 1 jug, which is a unit rate.
• For “The cost of photocopies is $1 per 10 pages”, the rate is $\frac{1}{10}=0.1$ dollars per page, not a unit - rate as the denominator is 10.
• For “The cost of roses is $50 per 2 dozen”, the rate is $\frac{50}{2}=25$ dollars per dozen, not a unit - rate as the denominator is 2.

Answer:

The cost of orange juice is $3 per jug.