Final answer:
To solve the problem, we find the unit price of the oranges and then multiply it by the number of oranges in 3 dozen.
Step-by-step explanation:
To solve this problem using a ratio box, we first need to find the unit price of the oranges. From the information given, we know that 8 oranges cost $3. This means that 1 orange costs $3 divided by 8, which is $0.375. Now, to find the cost of 3 dozen oranges, we need to determine how many oranges are in 3 dozen. One dozen is equal to 12, so 3 dozen is equal to 3 multiplied by 12, which is 36 oranges. Finally, we multiply the unit price of $0.375 by 36 to find the total cost of 3 dozen oranges, which is $13.50.