The part of the parabola 
has a length of 
.
Find the focus and directrix of the parabola.
Use 
.
Definitions:
Inefficiency
A situation where resources are not used in the most effective way, leading to wasted potential output.
Price Elasticity
A measure of how much the demand or supply of a product changes in response to a price change.
Increase Tax Revenue
Strategies or activities undertaken by a government to enhance the amount of money it collects from taxes.
Tax Incidence
Tax Incidence refers to the analysis of the effect of a particular tax on the distribution of economic welfare, showing which group – consumers or producers – ultimately bears the burden of the tax.
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