In short, international trade in livestock, poultry, and products to the US are very important because other countries are better equipped for certain products and goods. So international trade allows for the US to have access to those products and goods that may not be produced in the US at the demanded quantities and quality.
Answer:
Standard Deviation of D: It cannot be determined from the information given because the scores are not independent.
Explanation:
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Given the description of the meaning of "residence time," you must conclude ...
... D. Substances that have a shorter residence time do not stay in the atmosphere as long.