Answer:
A. Micro-economics
Explanation:
Micro-Economics represents a study of economic activiites or economic choices that affect individual businesses or organisations, individual consumers or individual families. Since the focus of Williams & Co is on determining appropriate prices for products sold in its individual firm, then the focus is micro-economics
Macro Economics represents the study of economic activities and choices but instead of the individual level, it studies these acivities at the overall national level or at the global level. So the study of pricing among the various detergent producing firms in the United States is under the purview of macro economics
Monetary policy focuses on the tools that are used to regulate the entire economy especially the Federal Reserve through the regulation of the activities of member financial institutions. 
Fiscal Policy focuses on the activities of government to control its expenditure, tax rates and overall monitor or regulate the economy  
 
        
             
        
        
        
Answer: A. Fewer new businesses were started in 2010 than in other years 
Explanation: 
 
        
                    
             
        
        
        
<span>In the example of the Magnira Corporation, the fruits are turned into jellies, jams, and marmalades an example of raw materials. Raw materials are basic, unprocessed materials that are used to manufacture goods. Raw materials are often referred to as commodities.</span>
        
                    
             
        
        
        
Answer:
a.$4 
Explanation:
initial price of fish dinner per piece was= $10
no. of fish dinner sold = 5 
total initial revenue= 5*10= $50
new price of fish dinner = $9 
and now six  fish dinners are sold 
new revenue= 6*9= $54
therefore the marginal revenue from the sixth dinner sold= 54-50= $4 
hence option a is correct