Worldwide annual sales of smartphones over a two year period were approximately  q = −4p + 3,030  million phones at a selling price of $p per phone. (a) Obtain a formula for the price elasticity of demand E. E = 4p/3030−4p​ (b) In one of the years the actual selling price was $365 per phone. What was the corresponding price elasticity of demand? (Round your answer to two decimal places.) E =   Interpret your answer. The demand was going down  by about    % per 1% increase in price at that price level. (c) Use your formula for E to determine the selling price that would have resulted in the largest annual revenue. $ =  What would have been the resulting annual revenue? (Round your answer to two decimal places.) $=    billion

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter2: Graphical And Tabular Analysis
Section2.5: Inequalities
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Worldwide annual sales of smartphones over a two year period were approximately 
q = −4p + 3,030
 million phones at a selling price of $p per phone.
(a) Obtain a formula for the price elasticity of demand E.
E = 4p/3030−4p​
(b) In one of the years the actual selling price was $365 per phone. What was the corresponding price elasticity of demand? (Round your answer to two decimal places.)
E =  
Interpret your answer.
The demand was going down  by about    % per 1% increase in price at that price level.
(c) Use your formula for E to determine the selling price that would have resulted in the largest annual revenue.
$ = 
What would have been the resulting annual revenue? (Round your answer to two decimal places.)
$=    billion
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