Question

The function f(x) is the total amount spent at a store, when purchasing x items that are $5 each and the items are not taxable. What is the practical domain for the function f(x)? all positive, real, whole nuvbers

Factors and multiples
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asked 2021-08-06
The function f(x) is the total amount spent at a store, when purchasing x items that are $5 each and the items are not taxable.
What is the practical domain for the function f(x)?
1) all positive integers
2) all real numbers
3) all whole numbers
4) all positive integers that are multiples of 5.

Answers (1)

2021-08-07

Answer:
all whole numbers
Explanation
We can purchase no item (i.e. zero item) or any n number of item where n is positive integer.
Therefore the practical domain is \(\left\{0,1,2,3,- - -\right\}\), which is set of whole numbers.

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