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A ballon has a circumfrence of 11cm. Use the circumference to approximate the surface are of the balloon to the nearest square centimeter! Help! A 31 B 121 C380 D 154
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A ballon has a circumfrence of 11cm. Use the circumference to approximate the surface are of the balloon to the nearest square centimeter! Help! A 31 B 121 C380 D 154

User Wpigott
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The answer is 380 as you use the circumference to find the radius and use the surface area of a sphere equation to get your answer.
User Jsonmurphy
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