Final answer:
The inequality that describes the weight of the special sundae is S ≥ 2.
Step-by-step explanation:
To write an inequality that describes the weight of the special sundae in kilograms, we can use the symbol ≥ (greater than or equal to). Let's assume S represents the weight of the sundae. Since it contains over 2 kilograms of ice cream, we can write the inequality as S ≥ 2.