Answer:
5040
Step-by-step explanation:
There are 7 ways to choose the first slot, 6 ways to choose the second slot, 5 ways to choose the third slot, 4 ways to choose the fourth slot, 3 ways to choose the fifth slot, 2 ways to choose the 6th slot, and 1 way to choose the last slot, so
7! = 7*6*5*4*3*2*1
7! = 7*6!
7! = 7 * 720
7! = 5040
