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Please help! two questions, thank you very much.

Please help! two questions, thank you very much.-example-1
User Lante
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Answer:

3) S = 4π(9²) = 324π ft² = about 1,017.88 ft²

4) S = 2π(9²) + 2π(9)(10) = 342π ft²

= about 1,074.42 mm²

User Bins Ich
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