based on the following information
The following graphs shows the revenue (in $ million) of three companies in their initial six years of operations, in an economy which is characterized by a persistent inflation.
The difference in the average percentage increase in revenues, from 4th to 6th year, of Yahoo and Facebook is:
The revenue of Yahoo in 4th year = 250 millions.
The revenue of Yahoo in 6th year = 1200 millions.
Therefore, average percentage increase in Yahoo's revenue in a year = $$[(\dfrac{1200}{250})^{0.5}-1]*100$$ = 119%
The revenue of Facebook in year 4 = 300 millions
The revenue of Facebook in year 6 = 2000 millions
Therefore, average percentage increase in Facebook's revenue in a year = $$[(\dfrac{2000}{300})^{0.5}-1]*100$$ = 159%
Therefore, the required difference = 159 - 119 = 40%. Hence, option B is the correct answer.
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