Economics Multiple Choice!?

Suppose that the quantity of a good demanded rises from 90 units to 110 when the price falls from $1.20 to $0.80 per unit. the price elasticity of demand for this product is:
A) 4 B) 0.5 C) 2 D) 1.5 E) 1

Suppose the government establishes a binding price floor on a good. I t can be said that at the rpice floor:
A) although consumers are purchasing all of the product that they desire at this rpice, the sellers are not selling all that they desire.
B) both seller and buyers are exchanging the euilibrium quantity.
C) a new equilibrium pric and quantity combination will be established
D) both sellers and buyers are satisfied with the quantity that is being exchanged.
E) although the sellers are selling all of the product hat they deire at this price, the consumers are not able to buy all that they desire.

Answer:
B)
A)
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