The correct answer is: $11$
Explanation
Let $b$ be the length in cm of one bow. Since both started with the same total ribbon length, we have for Down and Emily:
- Down: $12b + 128 = L$
- Emily (who made 9 bows): $9b + 176 = L$
Set them equal and solve for $b$.
Steps:
- Equate totals: $$12b + 128 = 9b + 176$$
- Rearrange: $$3b = 48$$
- Solve: $$b = 16\text{ cm}$$
With $16\text{ cm}$ per bow, Emily’s leftover $176\text{ cm}$ can make
$$\frac{176}{16} = 11$$
Therefore, Emily could make 11 additional bows with her leftover ribbon.