Final answer:
To express the rate of flow in cups per second, convert gallons to cups and minutes to seconds. The correct rate of flow is approximately 0.3 cups per second.
Step-by-step explanation:
To express the rate of flow in cups per second, we need to convert gallons to cups and minutes to seconds.
1 gallon is equal to 16 cups, so 620 gallons is equal to 620 * 16 = 9920 cups.
5.5 minutes is equal to 5.5 * 60 = 330 seconds.
Therefore, the rate of flow is 9920 cups / 330 seconds ≈ 30.1 cups per second.
So the correct answer is B) 0.3 cups per second.