A rational number is any number that can be expressed as a fraction (where both the numerator and the denominator are integers, and the denominator is not zero). Let's evaluate the options you provided:
- 8 - This can be expressed as \( \frac{8}{1} \), so it is a rational number.
- 00/100 - This simplifies to \( \frac{0}{100} = 0 \). Zero is also a rational number.
- Οπ - This seems to be a typographical error or an unreadable symbol and cannot be classified as a number.
- 7.8 - This can be expressed as \( \frac{78}{10} \), so it is a rational number.
- 0 √7 - This is not a standard representation. If you mean \( 0 \times \sqrt{7} \), that evaluates to 0, which is a rational number. If you mean just \( \sqrt{7} \), that is irrational.
Based on the standard definitions:
- 8 is rational.
- 00/100 is rational (equal to 0).
- 7.8 is rational.
So, the rational numbers among the given options are 8, 00/100, and 7.8.