Answer:
b. 5.75
Explanation:
Times Interest earned ratio is the measure of ability of a company to pay the interest on its debts. It is the ratio of earning before interest and tax and interest expense as below.
Times Interest Earned Ratio = Earning before interest and tax / Interest Expense
Times Interest Earned Ratio = $86,250 / $15,000
Times Interest Earned Ratio = 5.75 times
Answer:

if n=1 (monopoly) we have 
if n goes to infinity (approaching competitive level), we get the competition quantity that would be 
Explanation:
In the case of a homogeneous-good Cournot model we have that firm i will solve the following profit maximizing problem

from the FPC we have that


since all firms are homogeneous this means that 
then 
the industry output is then

if n=1 (monopoly) we have 
if n goes to infinity (approaching competitive level), we get the competition quantity that would be 