Final answer:
To find the baking time, convert the total bread-making time of 3 hours to minutes (180 minutes), and subtract the prep time of 135 minutes, which leaves 45 minutes of baking time.
Step-by-step explanation:
The question asks for the baking time for a loaf of bread, given that the total preparation, which includes baking, takes 3 hours and the prep time alone is 135 minutes. Start by converting the total time Abner and Xavier take to make the bread, which is 3 hours, to minutes. The conversion factor is 60 minutes equals 1 hour. This means 3 hours is equal to 3 × 60 = 180 minutes.
Since the preparation time is 135 minutes, you can find the baking time by subtracting the prep time from the total time. Therefore, the baking time is 180 minutes - 135 minutes = 45 minutes. So, Abner and Xavier bake the bread for 45 minutes.