​Average Costs

question 77

Multiple Choice

​Average costs.Suppose the average costs of a mining operation depend on the number of machines used,and average costs,in dollars,are given by , ,where x is the number of machines used.What is the minimum average cost? ​

• A) ​$0
• B) ​$35
• C) ​$490
• D) ​$245
• E) ​$8582

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Definitions:

Spatial Skills

The ability to understand, reason, and remember the spatial relations among objects or space.

Navigational Skills

The abilities and mental processes involved in the determination of one's position and the planning and following of a route.

Practice Driving

The act of rehearsing the operation of a vehicle under various conditions to enhance driving skills and safety.

Eye Contact

The act of looking directly into another person's eyes, often used as a means of communication and indication of attention or interest.