Answer: The product is 5^-4 or 0.0016 (decimal)
Explanation:
Hi, to solve this we have to apply the product rule, that says that if we multiply two powers that have the same base, the exponents can be added.
So, mathematically speaking:
(5^-1 )(5 ^-3) = 5 ^-4
Or, the decimal expression by solving:
5^-4= 0.0016
Feel free to ask for more if it´s necessary or if you did not understand something.