The circumference would be 53.38 because the formula on finding the circumference is pi times the diameter.
Swap the n with the 7
7-5
Find the answer to 7-5
7-5=2
So the answer is 2
Sn = (a1) x (1 - r^n) / (1 - r)
Substituting the known values:
S5 = (6) x (1 - (1/3)^5) / (1 - 1/3) = 242/27 = 8 24/27 = 8 8/9
