When stacking bags of dog food, the heaviest items should be placed at the bottom. Starting at the bottom, in what order should bags of dog food weighing 25 pounds, 20 pounds, 30 pounds, and 28 pounds be stacked?

30, 28, 25, 20

Sharon's share for lunch is $8. If she pays with a $20 bill, how much change should she get?

12

To determine the correct order for stacking the bags of dog food, you need to arrange them in descending order based on their weight.

First, let's compare the 25-pound bag with the other bags. It is lighter than the 30-pound bag and the 28-pound bag but heavier than the 20-pound bag.

Next, let's compare the 30-pound bag with the remaining bags. It is the heaviest bag, so it should be placed at the bottom.

Now, let's compare the remaining bags: the 20-pound bag and the 28-pound bag. The 28-pound bag is heavier, so it should be placed above the 20-pound bag.

Finally, the 25-pound bag is the lightest, so it should be placed on top.

Therefore, the correct order for stacking the bags from bottom to top is:
1. 30 pounds
2. 28 pounds
3. 20 pounds
4. 25 pounds