Answer:
8 from the box on right corner

Explanation:
Area is pi×r^2 and you times it by the fraction of the circle you have as its not a full circle.
False because I looked it up online
X=200
2/3 of 15 is 10 make that negative add it to the other side 1/5x = 40 and then multiply 40 by 5 to get your answer
Check
1/5 of 200 is 40 - 10 = 30
40-10=30
30=30