To find out how much Arianna paid for the ski jacket, we first need to calculate the sale price after the 25% discount and then apply the additional 10% off with her coupon.
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Calculate the 25% discount: \[ \text{Discount} = 25% \text{ of } 280 = 0.25 \times 280 = 70 \]
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Calculate the sale price: \[ \text{Sale Price} = \text{Original Price} - \text{Discount} = 280 - 70 = 210 \]
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Calculate the additional 10% discount: \[ \text{Additional Discount} = 10% \text{ of } 210 = 0.10 \times 210 = 21 \]
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Calculate the final price Arianna paid: \[ \text{Final Price} = \text{Sale Price} - \text{Additional Discount} = 210 - 21 = 189 \]
Therefore, Arianna paid $189 for the ski jacket.
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