Final answer:
The total flying time for the crop duster is calculated by adding together the hours flown each day it operated. The sum of 2.3, 3.1, and 5.4 hours gives a total of 10.8 hours for the week.
Step-by-step explanation:
The question requires the calculation of the total flying time for a crop duster over a week. To find the total, we add up the flying time for each day that the duster was in operation. On Monday, the crop duster flew for 2.3 hours, on Wednesday for 3.1 hours, and on Friday and Saturday combined for 5.4 hours.
The total flying time is calculated as follows: 2.3 hours (Monday) + 3.1 hours (Wednesday) + 5.4 hours (Friday and Saturday) = 10.8 hours.
Therefore, the correct answer is c) 10.8 hours.