Final answer:
The correct way to describe the set of all times that a roast chicken can be kept in the oven is m is any real number (option 1).
Step-by-step explanation:
The question concerns the correct way to describe the set of all times, in minutes, that a chicken can be left in the oven according to a given recipe.
To express the range of time that the chicken should be cooked, we use a set notation that includes the minimum and maximum time as specified.
Among the provided options, the correct one is (1) 55 ≤ m ≤ 80.
This means that m represents the cooking time in minutes, and it can be any real number including and between 55 to 80 minutes.