Answer:
The price elasticity of demand is -10
Step-by-step explanation:
Given


Solving (a): The coefficient of price elasticity of demand (k)
This is calculated as:

So, we have:



<em>Because |k| > 0, then we can conclude that the company made a wise decision.</em>
Answer:

Step-by-step explanation:

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Is there supposed to be parentheses?
Sorry don't know explane the question