Final answer:
To determine Emily's RDA for iron, information about her daily caloric intake is not needed. The RDA for iron depends on age, gender, and specific needs, rather than calorie consumption.
Step-by-step explanation:
To determine Emily's Recommended Dietary Allowance (RDA) for iron, you do not need the information about her daily caloric intake. The RDA for iron is the level estimated to meet the needs of nearly all individuals in a demographic group and is based on factors such as age, gender, and life stage-specific needs, rather than caloric intake. Since the iron needs of men and women differ significantly, with women requiring more than twice the amount that men do due to menstruation, Emily's gender is indeed relevant.
The factors considered for calculating RDA for iron include:
Age: Iron requirements can vary based on the life stage.
Gender: Men and women may have different iron needs.
Physiological Conditions: Pregnancy and lactation can influence iron requirements.
Moreover, the actual daily requirement of iron is important to know, considering that only about 10% of ingested iron is absorbed by the body.