The answer is A. (From Edge 2020)
Add the exponents in (7^5) and (7^3)
7^5 + 3 = 7^8
Now we have (7^8)^-4.
Use the reciprocal of 7^8. The reciprocal is [tex]\frac{1}{7^8}[/tex].
We now have [tex](\frac{1}{7^8})^4[/tex] . Multiply the exponents.
[tex](\frac{1}{7^8})^4[/tex] = 1/7^8 × 4 = 1/7^32
