Answer:
D
Step-by-step explanation:
Numbers that cannot be expressed as fractions are considered irrational numbers
π cannot be expressed as fraction therefore it is an irrational number
√64 = 8 which can be expressed as a fraction therefore √64 is not an irrational number
[tex]-\frac{7}{8}[/tex] is already expressed as a fraction therefore B is not the answer
.6 can be expressed is 6/10 therefore C is not the answer
