the fraudulent practioe of sending emails purponing to be from reputable comparies ingager to induce indwiduals to reveal personal information, such as pass words and credti card numbers.

Which of the following statements are true? 1. For cost increases to lead to sustained inflation, there must be persistent rises in costs followed by persistent government efforts to return output to its potential level. 2. For cost increases to lead to sustained inflation, there must be persistent rises in costs coupled with wage flexibility that always returns the labour market to equilibrium. 3. For demand increases to lead to sustained inflation, there must be persistent increases in demand followed by persistent government efforts to return output to its potential level. 4. For demand increases to lead to sustained inflation, there must be persistent increases in demand couplec with wage flexibility that always returns the labour market to equilibrium. 1 and 3 only 1 and 4 only 2 and 3 only 2 and 4 only

19. Suppose the labour market is away from equilibrium, with unemployment above the natural rate. The new Keynesian view of inflation and unemployment offers several reasons why the labour market can stay away from equilibrium for long periods. Which of the following is not one of these reasons? A Efficiency wages may hold wages below the equilibrium level. B Workers may resist wage cuts which reduce their wages below those paid to other workers in the same C Prices mation. D be sticky downwards in some markets because consumers prefer stable prices. D Prices may be sticky downwards in some markets because consumers may judge quality by price.

The graph to the right shows a region of feasible solutions. Use this region to find maximum and minimum values of the given objective functions, and the locations of these values on the graph. (a) \( z=4 x+3 y \) (b) \( z=1.75 x+1.25 y \)

3. \( 2^{4} \times 0,25-0,2^{4} \times 5^{4} \)

1. Dada las funciones: \( f(\boldsymbol{x})=\boldsymbol{x}^{2}-4 \quad y \boldsymbol{g}(\boldsymbol{x})=\boldsymbol{x}+2 \). Determina las operaciones de funciones. Traza las grafficas. a) \( (f+g)(x) \) b) \( (f-g)(x) \) c) \( (f . g)(x) \) d) \( \left(\frac{f}{g}\right)(x) \)