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Sarah is purchasing a shirt that is on sale for 20% off. She knows the function that represents the sale price of her shirt is s(p) = 0.8p, where p is the original price of the shirt. She also knows she has to pay 7% sale's tax on the shirt. The cost of the shirt with tax is c(s) = 1.07s, where s is the sale price of the shirt. Determine the composite function that can be used to calculate the final price of Sarah's shirt by solving for c[s(p)]. A - c[s(p)] = 0.856p B - c[s(p)] = 0.856sp C - c[s(p)] = 1.87p D - c[s(p)] = 1.87sp

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Answer:

A: c[s(p)] = 0.856p

Explanation:

c(s(p)) = c(0.8p) = 1.07·0.8p . . . . . . use s(p) as the argument for c(s)

c(s(p)) = 0.856p

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