Answer:
20.9 ounces of rice noodles are required to make 19 servings.
Explanation:
We are given the following in the question:
11 ounce bag = 10 servings
Ration of ounces of rice noodles to servings is:

We have to find ounces of noodles are needed for 19 servings.
Thus, we can write:

Thus, 20.9 ounces of rice noodles are required to make 19 servings.