#### Answer

3024

#### Work Step by Step

The number of possible permutations if r items are taken from n items is
nPr = $\frac{n!}{(n-r)!}$
9P4 = $\frac{9!}{(9-4)!}$ = $\frac{9*8*7*6*5!}{5!}$
Since 5! is in both the numerator and the denominator, cancel 5! in the numerator and the denominator.
9*8*7*6 = 3024