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Mathematics, 11.06.2021 21:10 ruba806

On the first day of training, Aretha holds a plank position for 30 seconds. She increases her time by 20% each day. What is the first day on which Aretha holds a plank for over a minute? Show your work.​

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On the first day of training, Aretha holds a plank position for 30 seconds. She increases her time b...
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