Step-by-step explanation
The set that we must describe is composed of those which are at least 6.5. At least means that these values are either 6.5 or greater. Then if n is any element of this set it meets the following condition:
![n\ge6.5](https://img.qammunity.org/2023/formulas/mathematics/high-school/pzh59y794f13t1b1ns94rotz5c55udif97.png)
Answer
Then the answer is the first option.