Answer:

Explanation:
Given: The company's market share had changed from 40 to 21 percentage points.
To find: percent change in market share
Solution:
Change in percentage of company's market share 
Percent change in market share = (Change in percentage of company's market share ÷ 40) × 100

the answer is b:) because high interest rates mean increased cost for all the others since it is not a fixed cost for them
If AR is constant, MR is equal to AR. Both are indicated by the same horizontal straight line(a situation of perfect competition)
<h3>What is the marginal revenue curve for a perfectly competitive firm?</h3>
- Marginal revenue for a company with perfect competition is the same as average revenue and pricing.
- This suggests that at values bigger than the average variable cost, the firm's short-run supply curve is its marginal cost curve.
- The company closes if the price falls below the average variable cost.
Marginal revenue is the change in total revenue when one more unit of a commodity is sold.
MR= change in TR/change in quantity sold
Average revenue refers to revenue per unit of output.
AR=TR/Q
Relationship between AR and MR:
If AR is constant, MR is equal to AR.
Both are indicated by the same horizontal straight line(a situation of perfect competition)
To learn more about marginal revenue, refer to
brainly.com/question/13444663
#SPJ4
Answer:
The answer is A.
Explanation:
B doesnt make much sense and C is just plain stupid
Opportunity cost because it was an option but not the right choice