5!.4! is equivalent to:

2880

Step-by-step explanation:

The "." or · means multiplication.

"!" means multiplying every consecutive positive whole number starting from 1 until the number infront of the "!". It's called a factorial.

4! = 1·2·3·4 = 24 The factorial of 4

5! = 1·2·3·4·5 = 120 The factorial of 5

Substitute the values of the factorials, then multiply them to solve.

5! · 4!

= (1·2·3·4·5) · (1·2·3·4)

= 120 · 24

= 2880 Answer

Therefore 5!·4! = 2880.