Answer:
![3](https://img.qammunity.org/2021/formulas/mathematics/middle-school/iqv29hrfsc6ps2xd84gabd3efiep5uq89f.png)
Explanation:
(2 decimal places)
If you want to arrange the tiles into a square, you will need 3.46 in each row/column.
This is physically impossible, hence you round it down to 3.
(If you round it up, you won't have enough tiles since
)
Thus, the square area will be
![3*3=9](https://img.qammunity.org/2021/formulas/mathematics/college/3wo90yjxtw7x920c1wbe91mo0g9bcj5jxn.png)
Tiles left:
![12-9=3](https://img.qammunity.org/2021/formulas/mathematics/college/44uswgieo20iwnd4klgbhhnvc26dew9np9.png)