Ana is purchasing new furniture and must pay a 10% sales tax. She can have the furniture delivered for an additional $25 fee that is not taxed. Which function represents the amount Ana will pay for furniture with a pretax price of x dollars?

The furniture price x is taxed at 10%, so its cost after tax is x + 0.10x = 1.10x. The $25 delivery fee is not taxed, so add it afterward: P(x) = 1.10x + 25. This is choice C; choice D incorrectly applies tax to the delivery fee as well.

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