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Teresa2026-07-10 16:55
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Grace2026-07-10 16:26
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Yalc2026-07-10 15:56
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Brian2026-07-10 14:25
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Henry2026-07-10 11:25
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WEN Chen2026-07-10 10:56
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WEN Chen2026-07-10 10:28
How you express the real answer:9.801*10^8
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Yalc2026-07-09 15:56
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Brian2026-07-09 14:25
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WEN Chen2026-07-09 10:56
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