Suppose demand is given by the equation: 
Using the midpoint method, what is the price elasticity of demand between $2 and $4?
Definitions:
Oscar Micheaux
A pioneering African American filmmaker and author, known for his work in the silent and early sound film eras, highlighting the complexities of race and social issues.
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Films or movies; a sequence of images projected onto a screen, creating the illusion of movement.
James P. Johnson
An influential American jazz pianist and composer, known as the "Father of the Stride Piano."
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A popular song and dance from the 1920s, known for introducing the Charleston dance to a wider audience.
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