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An item that sells for $145.99 has a sales tax of $10.22. a. Find a mathematical model that gives the amount of sales tax y

An item that sells for $145.99 has a sales tax of $10.22.

a. Find a mathematical model that gives the amount of sales tax y in terms of the retail price x.

b. Use the model to find the sales tax on a purchase that has a retail price x.

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