| Exam Board | OCR MEI |
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| Module | Paper 3 (Paper 3) |
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| Year | 2020 |
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| Session | November |
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| Topic | Geometric Sequences and Series |
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3 A particular phone battery will last 10 hours when it is first used. Every time it is recharged, it will only last \(98 \%\) of its previous time.
Find the maximum total length of use for the battery.