A. coefficient is the answer
Answer: The answer is 
Step-by-step explanation: Given that the penguin nursery is open two times in a day, where the number of hours open at the noon and afternoon are respectively given by

Therefore, the total number of hours 't' penguin nursery open every day is given by

Thus, the answer is

4.5 hours x 7 days
31.5 hours
It is not 4.5 x 14 because he works 7 days over the 2 week schedule