# Algebra

A package of paper towels contains 3 rolls. Each package of paper towels costs \$2.79.​

A function, f(x), is written to represent the cost of purchasing x packages of paper towels.

What is the practical domain for the function f(x)?

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1. f(x) = 2.79x , where 0 > x ≥ k , where k is the maximum number of packages one would buy

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