Determine whether each statement below is true or false.(5 points)

Here are the answers for each statement:

1. **-9 is a whole number.** - **False**
(Whole numbers are non-negative integers: 0, 1, 2, 3, ...)

2. **√64 is a rational number.** - **True**
(√64 = 8, which is a rational number.)

3. **π is an irrational number.** - **True**
(π cannot be expressed as a fraction of two integers.)

4. **0 is a natural number.** - **False**
(Natural numbers are typically defined as positive integers: 1, 2, 3, ...; but some definitions include 0.)

5. **2/3 is a rational number.** - **True**
(Any fraction where the numerator and the denominator are integers and the denominator is not zero is rational.)

So the final answers are:

1. False
2. True
3. True
4. False
5. True