in this scenario, Rachel's hearing threshold for detecting her friend's call is at a distance of 15 feet.The term hearing threshold denotes the sound level below which Rachel can not perceive and detect the sound. This value is different for each person and differ individually. It is used to determine a person's degree of hearing loss. 
 
        
                    
             
        
        
        
Answer:
<em>An electronic record</em>
Explanation:
An electronic record is data <em>that is or is being generated by a desktop. It is obtained when an agency or individual activity is initiated, conducted or completed.</em>
Instances of digital records include: email messages, handwritten documentation, electronic spreadsheets, digital photos, and databases.
 
        
             
        
        
        
Answer:
 d. Rise in price of alcohol
Explanation:
Change in Quantity demanded occurs due to change in Price. Change in Demand happens due to factors other than price - Income, Substitute & Complementary good's price, Taste. 
Change in alcohol demand - due to substitute Cigarette price change , Change [Decrease] in alcohol demand - due to change in taste based on anti drinking sentiments, higher risk of alcohol liver cirrhosis , Change [Increase] in alcohol demand - due to change [rise] in Income : These all are due to factors other than price & hence are 'Change in Demand' 
Rise in price of Alcohol leads to 'Change [Expansion] in Quantity Demanded' due to price change [rise] .
 
        
             
        
        
        
What are the options and I’ll tell you when you comment on mine when
        
             
        
        
        
Answer and Explanation:
The computation is shown below:
TC = 25 + q^2
Now 
Marginal cost is 
= dtc ÷ dQ 
= 2q
Average variable cost  (AVC) = q
We Assuming perfect competition so there is a free entry so no profits 
Therefore 
ATC = P
ATC = TC ÷ q  
= q + 25 ÷ q
Now 
MC = MR = P = ATC
2q = q + 25 ÷ q
q = 25 ÷ q
q^2 = 25
So, Quantity per firm = q = 5
Now 
P = MC = MR = ATC 
= q + 25 ÷ q  
= 5 + 25 ÷ 5  
= 5 + 5
= 10
hence, equilibrium price is 10
Now 
Q = 35 - P  
= 35 – 10
= 25
Hence, Market quantity (Q)  = 25
And, the number of firms i.e n 
N = Q ÷ q  
= 25 ÷ 5
= 5