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数学なのですが助けてください。
when Kathy bought a new bicycle, she was given a choice of one of two discount options for buying accessorise, such as a bike rack, water bottle, air pump, helmet, or gloves. the options are: Option1: A certificate for $5 off a total purchase of $25 or more. Option 2: 10% off any one accessory. what advice would you give to Kathy to help her determine which option she must choose to save the most money? show the mathematics you used to decide what your advice would be. これを英語で答えていただけるでしょうか?
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