Final answer:
Midnight eats 4 cups of dog food per day, but we do not have enough information about Rusty's food intake to compare the two. We calculate the daily intake by dividing the weekly intake by 7 days in a week.
Step-by-step explanation:
The question is asking us to calculate how many cups of dog food Tim's dog, Midnight, eats each day and compare that to an unspecified amount that another dog, Rusty, eats. To find out how many cups Midnight eats each day, we would divide the total number of cups eaten in a week by the number of days in a week. Since Midnight eats 28 cups of food in a week, we divide 28 by 7 (the number of days in a week) to find out that Midnight eats 4 cups of food per day.
We are not given any information about how much Rusty eats in comparison to Midnight, so we can't calculate the difference. If we knew how many cups Rusty ate, we could subtract that from Midnight's 4 cups to determine how many more cups Midnight eats compared to Rusty.