The terms rational and irrational refer to different types of numbers:

• A rational number is a number that can be expressed as the quotient or fraction of two integers (e.g., $\frac{a}{b}$, where $a$ and $b$ are integers and $b \neq 0$). Examples: $\frac{1}{2}, 3, -5$.

• An irrational number cannot be expressed as a simple fraction. Its decimal expansion goes on forever without repeating. Examples: $\sqrt{2}, \pi$, and $e$.

Now, let's evaluate 6.50:

• The number