Answer:
870
Step-by-step explanation:
Assuming you mean
30
Using the definition
n
= 
where n! = n(n - 1)(n - 2) ..... 3 × 2 × 1
Then
30
=
= 
Cancel the terms 28(27)... on numerator/ denominator, leaving
30
= 30 × 29 = 870
Sue is right...
Ex. area of 40
One shape can be 8 x 5
other shape can be 2 x 20.....
perimeter is different for both
95 is the answer because 2x35 is 70 so 3325 divided by 35 = 95