Answer: Percentage change in quantity would decrease by 12.5%.
Step-by-step explanation:
Since we have given that
Price elasticity of demand = -0.8
Price of each unit = $100
After change, price of each unit becomes = $110
% change in quantity would be

As we know the relation between price, quantity and elasticity.

Hence, Percentage change in quantity would decrease by 12.5%.
Angle 1= 45
Angle 2= 76
Angle 3= 80
By the Pythagorean theorem,

The second item would be $88 before tax since the tax rate is <span>9.375%</span>
<span>12x+2y=86 -
6x+2y=56
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6x = 30 => x = 30 : 6 = 5
2y = 56 - 30 => 2y = 26 => y = 13</span>