Answer:
is the addition to total output due to the addition of the last unit of an input, holding all other inputs constant. 
Explanation:
The marginal product of an input is the change in total output as a result of the change in output by 1 unit 
For example, the table below is the total product of labour 
amount of labour output 
1                                 10
2                                20 
3                                40
the marginal product of the 3rd worker = (40 - 20) / (3 - 2) = 20 
marginal product of the second worker = (20 - 10) / (2 -1 ) = 10
Average output = total output / labour 
 
        
             
        
        
        
Answer: Government regulation, Economies of scale
Explanation:
Barriers to entry refers to the restrictions that are imposed on the entry of a new firm or business into the market. These can be, 
a). <em>Government regulation</em>- Sometimes the government puts many restrictions on the entry of a new firm. These can be license requirement or by limiting the availability of a resource. 
b). <em>Economies of scale</em>- These refer to the efficiency in production that occurs when one firm grows larger in size and is able to cover the entire market at a lower cost than many small firms producing the same good in smaller quantities. The cost of production is lower for a single firm than for many firms. 
 
        
                    
             
        
        
        
Capital items. These include major purchases like buildings, fixed and accessory equipment. 
 
        
             
        
        
        
Answer:
C: imagine how separatethings will lokk if they were put together in a particular way.
Explanation:
  The person that has the spatial ability of visualization is able to change things around them and visualize a perfect location for them because this skill is a manifestation of their perceptions and the facility they have for remembering things, places, distances, positions, etc. They visualize the perfect place for objects.
 
        
             
        
        
        
Answer:
c. investment expenditures
Explanation:
The reason for this is that during business cycles investors gain trust in the economy during a boom and invest a lot and during a recession they lose trust in the economy and decrease their investment by a lot, where as a lot of consumption like food, medicine, petrol etc remains mostly unaffected by changes in business cycle. Also government spending does not fluctuate a lot during the course of a business cycle because government spending is either long term like development projects.