Answer:
. C) a drop in the foreign exchange value of the dollar.
Explanation:
An aggregate demand curve can be regarded as a curve that display total spending that is available 
 domestic goods/services with respect to their price level. the horizontal axis provide the real GDP while price level is displayed by vertical axis. It should be noted that The aggregate demand curve would shift to the right as a result a drop in the foreign exchange value of the dollar.
 
        
             
        
        
        
Answer:
c. $150.
Explanation:
the extra amount of hours Maurice can work taking a flight will be of 5 hours
(8 hours taking a plane against 3 hours if driving)
As the income per hour is 30 dollar it can generate;
5 hours x $30 per hour = $150
Maurice will only travel by plane if it generates the same or more income than the driving thus, a differencial price of less than 150 dollars will provide Maurice with a net gain. Also we should consider that if Maurice drives his car it is taking a depreication hit per mile while driving that is being ignoer to keep the assignment simple. But considering that the amount of differential income could be higher than $150 
 
        
             
        
        
        
Answer:
The three primary characteristics of perfect competition are (1) no company holds a substantial market share, (2) the industry output is standardized, and (3) there is freedom of entry and exit. The efficient market equilibrium in a perfect competition is where marginal revenue equals marginal cost.