The answer is 12x^2. you multiply -4 by -3
The top 4 firms have (23 +22 +18 +12)% = 75% of the market.
The 4-firm concentration ratio is 0.75 or 75%.
Answer:
The positive solution is 2.4.
Step-by-step explanation:
The given functions are


It is given that




The quadratic formula:







Therefore the positive solution is 2.4.
(4x-6)/3=8
4x-6=24
4x=30
x=7.5 or x=30/4