Okay, here we have this:
Considering the provided operation, we are going to perform it, so we obtain the following:
Let us remember that when two terms with the same base are multiplied, then the base is preserved and the exponents are added, in this case we have:
[tex]\begin{gathered} a^4\cdot a^6 \\ =a^{(4+6)} \\ =a^{10} \end{gathered}[/tex]Finally we obtain that the operation is equal to a^10.