Answer:
Muffins and Pretzels
Explanation:
Muffins: 70/400 = 0.175 or 17.5
Pretzels: 70/400 = 0.175 or 17.5
17.5 is closest to 18%
So, the sections of the circle graph that represent 18% of the entire circle are muffins and pretzels, since they are closest to 18%