Suppose the Average Costs of a Mining Operation Depend on the Number

question 61

Multiple Choice

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. Over what interval in the domain do average costs decrease? ​

• A)​

---

Definitions:

Freshwater Fish

Fish species that live in rivers, lakes, and streams, differing from those in marine environments in terms of habitat and salinity tolerance.

Extinct

A term describing species that no longer exist anywhere on Earth.

Recreational Value

The worth derived from natural resources for leisure activities.

Ecological Value

A measure of the importance of a particular ecosystem or species in terms of its benefit to the environment or human wellbeing.