Answer:
<em>Good luck!</em>
Step-by-step explanation:
Hey there !
No. of ways to arrange n objects is n!
[ When there's no conditions ]
Hence , number of ways we can arrange 9 performers is 9! = 362880 Ans.
Hope it helps!
Answer:

Step-by-step explanation:

First, you need to evaluate
:

Now, you plug this into
and evaluate
:

Now you know
.
Answer:
1080
Step-by-step explanation:
(n-2) × 180
(8-2) × 180= 1080