To rotate the point \((5, 8)\) by 180 degrees clockwise, you can use the rule that rotating a point \((x, y)\) by 180 degrees gives you the point \((-x, -y)\).
Applying this to the point \((5, 8)\):
\[ (x, y) = (5, 8) \quad \implies \quad (-x, -y) = (-5, -8) \]
Thus, the new point after a 180-degree clockwise rotation is \((-5, -8)\).
So, the correct response is:
\((-5, -8)\)