I believe the answer is 9, because 1/3 is .33 so 33%. so 33% is equal to 3 buttons and add another 66% which would be another 6 buttons would add up to 99% in all. after that I don't think they would add a quarter of a button.
Answer:
d
Step-by-step explanation:
you just get the same anwser
I hope this helps you
Circumference=2.r+Arc Length
6=2.r+1
r=5/2
Arc Length=Degree /360.2.pi.r
1=Degree /360.2.3,14.5/2
Degree=360/15,7
Degree =22,93