1 The presence of a substance and the amount of that substance. 2  Thus, an assay may be done for example to determine the level of thyroid hormones in the blood of a person suspected of being hypothyroid (or hyperthyroid). 3  The biological or pharmacological potency of a drug. Thus, an assay may be done for example to determine the level of thyroid hormones in the blood of a person suspected of being hypothyroid (or hyperthyroid). 2  The biological or pharmacological potency of a drug. 3  For example, an assay may be done of a vaccine to determine its potency.
The total cost curve graphically represents the relation between total cost and the quantity of production. This curve can be derived in two ways. One is to plot a schedule of numbers relating output quantity and total cost. The other is to vertically add the total variable cost curve and the total fixed cost curve.he total cost curve is frequently used with a total revenue curve to determine the profit maximizing level of production for a firm. However, this curve is perhaps most important as the basis for deriving the average total cost curve and the marginal cost curve.
The average total cost (ATC) curve will be negatively sloped so long as. A. Average variable cost is less than average total cost. B. Marginal cost is greater than average total cost. C. Average fixed cost is less than average total cost.he period in which there are no fixed costs is the. A. Production run. B. Long run. C. Short run. D. Implicit run. 72. The long-run average total cost curve is constructed from the. A. Minimum points of the short-run marginal cost curves.