Well, Carol seems to be quite the mathematician, but let's see if they are right.
First, let's simplify the expression:
-520/105 • 16/15 • (-1/2) = -32/3 • 16/15 • (-1/2)
= -32/3 * 16/15 * -1/2
= -32/3 * -1/3
= 32/9
Now, let's compare it with 2.5:
32/9 ≈ 3.555
Since 32/9 is approximately 3.555, which is greater than 2.5, Carol is incorrect.
So, Carol might be a math whiz, but even the best of us can make mistakes sometimes.