A Relation Is in Third Normal Form (3NF)if and Only

question 52

Multiple Choice

A relation is in third normal form (3NF) if and only if it is in 2NF and ________.

• A)all non-key attributes are determined by the entire primary key
• B)there are no non-key attributes determined by another non-key attribute
• C)every attribute is a candidate key
• D)every candidate key is a determinant

Identify strategies for managing stress and its effects on health.

Recognize the signs and symptoms of posttraumatic stress disorder (PTSD).

Understand the importance of ongoing screening for PTSD for individuals with a history of trauma.

Describe the effects of PTSD on social interactions and relationships.

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Definitions:

Economies of Scale

The cost advantages that enterprises obtain due to their scale of operation, with cost per unit of output generally decreasing with increasing scale as fixed costs are spread out over more units of output.

Long-run Average Total Costs

The average cost per unit of output where all inputs, including capital, are variable and the firm has adjusted all inputs to find the lowest average cost.

Long-run Marginal Cost

The change in total cost when producing one additional unit of a product or service in the long term, where all inputs are considered variable.

Economies of Scale

Enterprises gain cost benefits from their operation size, as the cost for each unit produced typically drops when the scale enlarges because fixed expenses are distributed across a greater number of output units.