Answer: Product Life cycle
Explanation: Product Life cycle is a concept used to describe the various stages which a product will have to undergo from the time of introduction into the market till the time it will eventually be out of the market. Different products have different life cycle,the life cycle is determined by different factors. The shape of a product's life cycle is that of a BELL SHAPE
The stages include Introductory stage, Growth stage, Stabilization stage and decline stage.
Answer: (b) -3.08
Explanation:
The relationship between the demand(q), price per unit product(p) and the disposable income,yd is given by the expression below;
q= 20ln(7yd-2p).
From the expression above, the marginal demand,
∂ q/∂ p is the differential of the equation of relationship between the demand, price and disposable income.
This involves considering the demand,q as the dependent variable and the price per unit product,p as the independent variable and the disposable income,yd is considered constant.
Therefore ,
∂ q/∂ p= (-40)÷(7yd-2p)
By substitution of
yd =$3000÷1000= $3
and p= $4
∂ q/∂ p= (-40)÷((7×$3)-(2×$4))
∂ q/∂ p= -40÷13= 3.08
Please see the attachment for knowledge on how ∂ q/∂ p was obtained.
