Answer:
42.4
Step-by-step explanation:
A = πr^2 = π·6^2 ≈ 113.09734
113.1 is the overall area of the pizza, now you must divide the area by 8 because there are 8 slices.
113.1/8 = 14.14
14.14 is the area of each slice so multiply that by 3 because thats the amount of slices juan ate.
14.14·3 = 42.4
*The answer should be roughly 42.4, i rounded the answers in each step so if your quiz/exam has multiple choice it may not be this exact number but just about the same.*