Simply each expression completely and you can use the power to power rule to solve this

Answer:
c = 240
Step-by-step explanation:
Using the rule of exponents
[tex](a^m)^{n}[/tex] = [tex]a^{mn}[/tex]
Then
[tex](a^{40}) ^{6}[/tex]
= [tex]a^{40(6)}[/tex] = [tex]a^{240}[/tex]