Answer
$\frac{4}{y^4}$
Work Step by Step
Given: $4x^0y^{-4}$
Apply the Zero Exponent Property: $x^0=1$
Apply the Negative Exponent Property: $y^{-4}=\frac{1}{y^4}$
Hence, $4x^0y^{-4}=\frac{4}{y^4}$
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