The answer to this question is A
Answer:
Step-by-step explanation:
we know that
The roots of f(x) or the x-intercepts of f(x) are the values of x when the value of f(x) is equal to zero
In this problem
Observing the graph
The roots are and the multiplicity is
-1-------> multiplicity 1 (odd number)
+1 -----> multiplicity 2 (even number)
+3-------> multiplicity 1 (odd number)
R + c=24
r=3c
3c+c=24
x=6
So there are 18 rock CDs