If you started in the city of D and traveled to the city of A, what direction would
you go?

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

Political boundaries are determined by the political party in control at the time. true or false