If I have an

$$

$\backslash$times

$$

n$\backslash$times n grid of squares and each square can be filled with

$$

k different letters then how many unique ways can I fill in the grid.

$($choose the one best answer$)$

The following multiple$-$choice options contain math elements, so you may need to read them in your screen reader's $$reading$$ or $$browse$$ mode instead of $$forms$$ or $$focus$$ mode.

Choice $1$ of $5$:

$$

$$

n

k

Choice $2$ of $5$:

$$

$$

k

n

Choice $3$ of $5$:

$$

$2$

$$

n

$2$k

Choice $4$ of $5$:

$$

$2$

$$

n

$2$

k

Choice $5$ of $5$:

$$

$$

$2$

k

n

$2$