A monopoly firm can sell 150 units of output for $10 per unit. Alternatively, it can sell 151 units of output for $9.90 per unit. The marginal revenue of the 151st unit of output is

Suppose an increase in investment spending results in an increase in equilibrium real GDP and a rise in the equilibrium price level. This implies that the aggregate supply curve for this economy is vertical

a. True b. False Indicate whether the statement is true or false

"The president of the world's biggest polluter (the United States) needs to do more than propose well-intentioned but insufficient measures that amount to using a squirt gun to quell a raging fire." Is this a positive or a normative economic statement? Explain your answer