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Please help? I have 2 questions. Thank you.
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3 votes
Please help? I have 2 questions. Thank you.

Please help? I have 2 questions. Thank you.-example-1
User Szymon
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Surface area of a sphere = 4πr² = 4π(15)² = 900π m²

Surface area of a sphere = 4πr² = 4π(10)² = 400π m²
User Mathias Schnell
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