## anonymous 4 years ago Which of the following is an equivalent representation of 5^-4? Choices: 1/256 1/64 1/16 1/625

Any negative exponent means it's a reciprocal, i.e.: $a^{-b}=\frac{1}{a^b}$So: $5^{-4}=\frac{1}{5^4}$Try it, now.