In the Analysis of Traffic Flow, a Certain City Estimates

question 22

Multiple Choice

In the analysis of traffic flow, a certain city estimates the following situation for the "square" of its downtown district. In the following figure, the arrows indicate the flow of traffic. If represents the number of cars traveling between intersections A and B, represents the number of cars traveling between B and C, the number between C and D, and the number between D and A, we can formulate equations based on the principle that the number of vehicles entering an intersection equals the number leaving it. That is, for intersection A we obtain Formulate equations for the traffic at B, C, and D. ​ ​

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Definitions:

Level of Output

The quantity of goods or services produced by a company, industry, or economy within a given period.

Farmer

An individual engaged in agriculture, raising living organisms for food or raw materials.

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The process by which a person acquires the ability to learn, think, reason, communicate, and remember throughout their life, beginning from infancy.

Plasticity

The capacity of the brain to change and adapt in structure or function in response to learning and experience.