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)?

these are the options

all real numbers

all whole numbers

all whole numbers that are multiples of 3

all positive integers

I selected the last one. Is this right????? Plz help!

1 answer

I believe you are right. The number of rolls will not be negative and they come in a plastic wrapping that makes it difficult to buy a fractional roll.
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