3. Riley planted flowers in some of her
   garden. Then, she planted vegetables in
   of her garden. Now, of Riley’s garden
   is planted. What fraction of Riley’s
   garden is planted with flowers? How
   much of her garden is not planted?
   

Let’s break it down! Riley has of her garden planted with both flowers and vegetables. She already planted vegetables in of her garden. To find out how much is planted with flowers, we subtract the vegetables from the total planted:

.

So, of Riley’s garden is planted with flowers, and since her total garden is , the amount not planted is:

.

Thus, the correct answer is (D): of her garden is planted with flowers, and is not planted.

Now, here’s a little trivia: Did you know that gardens have been around for thousands of years? Ancient civilizations cultivated them not just for food but also for beauty and relaxation. In fact, the Hanging Gardens of Babylon are one of the Seven Wonders of the Ancient World!

On a practical note, when planning a garden, knowing how much space each plant needs helps tremendously. Many gardeners make the mistake of cramming too many plants into small areas, which often leads to competition for nutrients and sunlight. It’s crucial to give plants room to grow!