Which quotient does not belong with the other three? Explain your reasoning.

Answer:
The third from the top does not belong with the others.
Step-by-step explanation:
With the exception of the 3rd quotient, the expressions all involve powers of the same base. There is an exponent property that can be used in such a situation:
[tex]\frac{a^m}{a^n}=a^{m-n}[/tex]
but the base, a, must be the same in both parts of the quotient!