Use the price-demand equation p+0.004x = 42, 0sps42. Find the elasticity of demand when p $22. If the $22 price is decreased by 10%, what is the approximate percentage change in demand? The elasticity of demand when p = 22 is (Type an integer or a simplified fraction.) If the price is decreased by 10%, the demand approximately %. (Type an integer or a simplified fraction.)

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