Sure, let's analyze each number to determine if it's rational:
1. 4TT:
- It's unclear what "4TT" represents. If this is meant to be a typo or something else, we cannot ascertain if it's rational or not without further clarification.
2. √12:
- The square root of 12 (√12) is an irrational number. Irrational numbers cannot be expressed as a ratio of two integers.
- Simplifying √12 yields: √(4 × 3) = 2√3.
- Since √3 is irrational, 2√3 is also irrational.
3. 0.020020002...:
- This decimal appears to be non-terminating and non-repeating. Non-terminating, non-repeating decimals are classified as irrational numbers.
4. 0.8:
- This is a terminating decimal.
- It can be expressed as a fraction: 0.8 = 8/10, which simplifies to 4/5.
- Since it can be written as a ratio of two integers, it is a rational number.
Therefore, the only rational number from the list provided is 0.8.
