Question

5!·4! is equivalent to:

Answer 1

5! = 5x4x3x2x1
what 4!??

Answer 2

\[5!\times4!=(1\times 2\times 3\times 4\times 5)\times(1\times 2\times 3\times 4)\]

Answer 3

so then whats the answer

Answer 4

(5!)(4!)²
(5)(4!)²
20!

these are my options
is it 20!

Answer 5

No.

Answer 6

Use a calculator.

Answer 7

i did how would you do this ! on a calculator

Answer 8

Test all the options with your nifty calculator.

Answer 9

Your calculator should have it. You should really get an approved calculator.

Answer 10

In Australia we're required to have the "Board of Studies" requirement of a calculator.

Answer 11

Pull common factors from Azteck's answer:
\[5!\times4!=(1\times 2\times 3\times 4\times 5)\times(1\times 2\times 3\times 4) = 5 \times (1 \times 2 \times 3 \times 4)^{2}\]

Answer 12

Hint:

5! = 5*4!

Answer 13

^ that way makes it easier.

Answer 14

so that means

5! * 4!

is the same as

5*4! * 4!

Answer 15

There's no need for a calculator here, it probably makes it more work.

Answer 16

i have one of those 200 dollar calculators it doesnt have it

Answer 17

if you have a TI calculator, then you can use the ! or factorial button to get the job done

Answer 18

2880

Answer 19

Let her work it out by hand first.

Answer 20

if you have a TI 83 for instance, you hit the math button, then you go to the probability menu, then scroll down to 4

Answer 21

i got 2880 but thats not an option