A factorial, represented as [tex]n![/tex] (where [tex]n[/tex] is an integer), is equal to the product of itself and all integers less than it until you get to one. Represented mathematically, we could say:
[tex]n! = n \cdot (n - 1) \cdot (n - 2) \cdot \, \ldots \,\cdot 1[/tex]
When we use the formula, we can find 4!, as shown below:
[tex]4! = 4 \cdot (4 - 1) \cdot (4 - 2) \cdot 1[/tex]
[tex]4! = 4 \cdot 3 \cdot 2 \cdot 1[/tex]
[tex]\boxed{4! = 24}[/tex]
4! is equal to 24, or the last answer choice.
