Answer:
15.39 bags or 16 bags
Step-by-step explanation:
To get the area of a circular garden, you use the following formula:
area = pi * r^2
Plug in r = 28 feet:
area = pi * 28^2
area = about 2463 square feet
Each bag covers 160 sq ft, so divide:
2463 sq ft / 160 sq ft per bag
= 15.39 bags
But you can't have a partial bag, so round up to:
16 bags
