Answer:
53 if rounding to nearest 10
53.38 if not
Step-by-step explanation:
It's pretty simple actually, let's put vocabulary though
π = pie
r = radius C = circumference
ok now the formula for circumference is,
C = 2πr
because they gave you the radius, it is very simple
plug it in.
C = 2(3.14)(8.5)
3.14 x 2 = 6.28
8.5 x 6.28 = 53.38
if you're rounding to the nearest 10 it will be 53.
welcome:)