Final answer:
By dividing the total cost of $16.20 by the total number of eggs (36 eggs), we find that the unit price of eggs Chef John bought is $0.45 per egg, making option c the correct answer.
Step-by-step explanation:
To calculate the unit price of eggs purchased by Chef John, we need to divide the total cost by the total number of eggs. Chef John bought 3 dozen eggs for $16.20. One dozen contains 12 eggs, so 3 dozen equals 36 eggs. To find the unit price per egg, we'll divide the total cost by the number of eggs:
$16.20 ÷ 36 eggs = $0.45 per egg
So the unit price is $0.45 per egg, which means option c is the correct answer. This calculation also helps us understand the concepts of unit conversion and price per unit, important in dealing with quantities and costs.