Evaluate ((-9)^0j^-1k^-4)/(2^0)

$\frac{{(- 9)}^{0} j^{- 1} k^{- 4}}{2^{0}}$

Raise to zero.

Move $j^{- 1}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{k^{- 4}}{2^{0} j}$

Move $k^{- 4}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$\frac{1}{2^{0} j k^{4}}$

Simplify the denominator.

Anything raised to $0$ is $1$ .

$\frac{1}{1 j k^{4}}$

Multiply $j$ by $1$ .

$\frac{1}{j k^{4}}$