Answer:
12
Step-by-step explanation:
So in your case, n = 4 and r = 2.
n! = 4! = 4*3*2*1
(n-r)! = (4-2)! = 2! = 2*1
So....
i think the given graph is inverse
looking at the straight line, it touches the axis at (-2,0) and (6,0)
A = l*w
A = 72* 56
A= 4032
4032 = L*21
4032/21 =L
L =192
the answer is 11.7 because you round up the decimals