Yes the answer is number 4
Answer:
variable costs
Explanation:
According to my research on monopolistically competitive firms, I can say that based on the information provided within the question they will continue to produce as long as the revenue covers variable costs. This term is defined as the costs that change as the quantity of the product that is being produced changes.
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George Washington, my dude.
Answer:laboratory experimentation
Explanation:
The type of investigation that represent the descriptive method of scientific inquiry are; observation, case study and survey.
<span>Their border is controlled by another nation that could cut off access to trade in times of conflict. </span>