Final answer:
To meet her daily protein recommendation, Christie would need to have 2 servings of the snack.
Step-by-step explanation:
To figure out how many servings of the given snack Christie should have to meet her daily protein recommendation, we first need to determine how much protein she has already consumed. Since Christie's doctor recommends she eat 40 grams of protein a day, and she has already consumed 50% of her protein recommendation, she has consumed 20 grams of protein so far. This means she needs to consume an additional 20 grams of protein. Now, we can look at the nutrition facts for the snack to determine how many grams of protein are in one serving. Let's say one serving of the snack contains 10 grams of protein. To meet her daily protein recommendation, Christie would need to have 2 servings of the snack (10 grams per serving * 2 servings = 20 grams of protein).