SOLUTION: what is the surface area of a balloon with a circumference of 17 cm?

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Question 578725: what is the surface area of a balloon with a circumference of 17 cm?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
SA = 4 * pi * r^2

c = 2 * pi * r ___ c / (2 * pi) = r

so, SA = c^2 / pi