Duke increased his spending on steak from 7 to 11 per week ...

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Duke increased his spending on steak from 7 to 11 per week because of a 12 percent salary increase, so his
 
  A) income elasticity of demand for steak is 1.37.
  B) price elasticity of demand for steak is 1.37.
  C) income elasticity of demand for steak is 3.7.
  D) price elasticity of demand for steak is 3.7.

Question 2

In the absence of property rights, factories will dump waste into a waterway up to the point where ________ equals ________.
 
  A) marginal social cost; marginal social benefit
  B) marginal social cost; marginal private cost
  C) marginal private cost; marginal private benefit
  D) marginal private cost; marginal social cost

[Meganchabluk]

Answer to Question 1

C

Answer to Question 2

C

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TYSM

[nothere]

Thanks for the timely response, appreciate it