A package of paper towels contains 3 rolls. Each package of paper towels costs $2.79.
A function of f(x) is written to represent the cost of purchasing.
What is the practical domain for the function?
All whole numbers
All positive
All whole numbers that are multiples of 3
All real numbers
well, towels usually come in whole rolls, right?
But the domain is for packages of towels, not individual rolls, so not multiples of 3.
Pick #1
because whole numbers are in fact always positive.
To determine the practical domain for the function f(x), we need to consider the context of the problem.
The function f(x) represents the cost of purchasing a package of paper towels. Since we cannot buy a fraction of a package, the number of packages must be a whole number. Therefore, the practical domain should only include whole numbers.
Now, let's consider the given information that a package contains 3 rolls and costs $2.79. Since we can buy any number of packages, the number of packages can be any positive whole number.
Therefore, the practical domain for the function is "all positive whole numbers."