Table 151
Use These Data to Answer the Following Question

question 42

Multiple Choice

Table 15.1
Use these data to answer the following question:
$\begin{array}{lll} \underline{\text { Bacteria}} & \underline{\text { Portal of entry }} & \underline{\mathrm{ID} 50} \\ \text { Staphylococcus aureus } & \text { Wound } & <10 \\ \text { S. aureus } & \text { Wound }+ \text { ampicillin } & 300\end{array}$
-The administration of ampicillin before surgery

• A) Replaces tetracycline.
• B) Increases the risk of staphylococcal infection.
• C) Decreases the risk of staphylococcal infection.
• D) Has no effect on risk of infection.
• E) Can't tell.

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Definitions:

Marginal Cost

The amount spent on producing an additional unit of a product or service.

Monopolistically Competitive

A market structure where many firms sell products that are similar but not identical, allowing for competition based on quality, price, and branding.

Long-run Equilibrium

A state in which all firms in a competitive market are making just enough profit to stay in business, with no incentive to enter or leave the market.

MR = MC

A condition where a firm's marginal revenue (MR) equals its marginal cost (MC), commonly used to determine the profit-maximizing level of output.