Marginal revenue equals marginal cost at an output of 15 units. At this output, marginal revenue equals $30, average variable cost equals $20, and average total cost equals $25. In the short run, a profit-maximizing firm will earn a profit of

Which of the following statements is true?

A) A nation's institution comprises of the rules and regulations in the nation, while a nation's culture comprises of the saving habits of its citizens. B) A nation's culture comprises of both the saving habits of its citizens and the rules and regulations in the nation. C) A nation's culture comprises of both the ongoing tax rate and the rules and regulations in the nation. D) A nation's culture comprises of the ongoing tax, while a nation's institutions comprises of the rules and regulations in the nation.

Sometimes the response to price signals, rather than the signals themselves, may be flawed.

Answer the following statement true (T) or false (F)