Answer :
If we suppose demand is perfectly elastic and if price equals $20, then the marginal revenue would be A. equals $0.
What is an Elastic Demand?
This refers to the term that is used to describe a demand where any price increase leads to a demanded quantity dropping down to zero and essentially reduces the price of goods available.
Hence, we can see that when it comes to marginal revenue, is also a term that is used to describe the revenue a company earns in revenue for each additional unit sold.
With this in mind, what we can deduce is that when the demand is perfectly elastic and if the price equals $20, then the marginal revenue would be A. equals $0.
This, when demand is perfectly elastic, the conclusion that can be made is if the price is about $20, it would fall to $0 because of the marginal revenue which is a factor of demanded quantity dropping down to zero
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