Answer:
So unit elastic at q = 5
inelastic above 5 
and elastic below 5
Explanation:
The elasticity is determianted by the marginal revenue.
Our first goal is to find the marginal revenue function
p = 40 - 4q
total revenue(TR)  =  quantity times price
q x (40 - 4q) = -4q^2 +40q
marginal revenue TR(q)/d(q)  = -8q + 40
Now, with this fuction the economic analisys states that a demand is unit elastic when marginal revenue is zero.
It will be inelastic below zero and elastic above zero
MR will be zero when q = 5
-8(5) + 40 = 0
As quantity increases the demand will be inelastic
while 
 
        
             
        
        
        
Answer:
The balance in the Treasury Stock account reduces total Stockholders' Equity
Explanation:
Treasury stock also known as reacquiring stock refers to outstanding shares which were previously owned by a company which is then bought back by shareholders of that company. Treasury stock do not have much value but provide  means of  raising the price of share which in turn provides profits for investors.  
Treasury stock is normally recorded in the shareholders equity section of the balance sheet representing the number of repurchased shares from the open market, thereby reducing shareholder's equity by the amount paid for the stock
 
        
             
        
        
        
Answer:
false
His purchase left GDP unchanged
Consumption of non durables would increase. 
Also, net export would decrease.
these effects would cancel out
Explanation:
Gross domestic product is the total sum of final goods and services produced in an economy within a given period which is usually a year
GDP calculated using the expenditure approach = Consumption spending by households + Investment spending by businesses + Government spending + Net export
Net export = exports – imports
 
        
             
        
        
        
I believe it is 75? I may be incorrect
        
                    
             
        
        
        
Answer:
exists when a production or consumption of a product results in a coast of third party