Exhibit 21-4 ​

question 220

Multiple Choice

Exhibit 21-4
​

-Refer to Exhibit 21-4. Curve B is a(n) __________ cost curve.

• A)marginal
• B)average variable
• C)average total
• D)average fixed

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Definitions:

SLC 500

A series of small programmable logic controllers (PLCs) manufactured by Allen-Bradley designed for small to mid-size automation projects.

Accumulated Value

In computing and data processing, this term refers to a total that increases over time as more data or units are added.

Preset Value

A predefined or user-set value that determines when a certain action should be taken or when a specific condition is met within a system.

Timed Contact

"A normally open and/or normally closed contact that is actuated at the end of a timer’s time-delay period."