Assuming the inverse demand function for good Z can be written as P = 90 - 3Q,when P = 20,the point price elasticity of demand is equal to (approximately):
A)-0.22.
B)-0.29.
C)-0.67.
D)-4.5.

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The Answer of Assuming the inverse demand function for good Z can be written as P = 90 - 3Q,when P = 20,the point price elasticity of demand is equal to (approximately):
A)-0.22.
B)-0.29.
C)-0.67.
D)-4.5.

Assuming the Inverse Demand Function for Good Z Can Be