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31 March, 09:57

College students are offered a 8 % discount on a textbook that sells for $ 45.50. If the sales tax is 8 %, find the cost of the textbook including the sales tax.

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  1. 31 March, 10:10
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    45.50 - 0.08 (45.50) = 45.50 - 3.64 = 41.86 ... cost after the discount

    41.86 + 0.08 (41.86) = 41.86 + 3.35 = 45.21 < = = cost + tax
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