Is there suppose to be a link or something more to this question?
From the problem :
![6^4\times6^{-5}](https://tex.z-dn.net/?f=6%5E4%5Ctimes6%5E%7B-5%7D)
In multiplying expressions with the same bases, the exponent will be added accordingly.
For example :
![a^m\times a^n=a^{m+n}](https://tex.z-dn.net/?f=a%5Em%5Ctimes%20a%5En%3Da%5E%7Bm%2Bn%7D)
the exponent of a are m and n, and the product will be a raised to the sum of m and n.
Applying this to the problem, we have :
![6^4\times6^{-5}=6^{4-5}=6^{-1}](https://tex.z-dn.net/?f=6%5E4%5Ctimes6%5E%7B-5%7D%3D6%5E%7B4-5%7D%3D6%5E%7B-1%7D)
The answer is d. 6^-1
Each student will get a boot up the anus