To determine the profit maximizing production quantity the steps below should be followed;
i) Determine the Marginal Cost from the the Total Cost function.
TC(q)=20+4q+0.1q2
Differentiate the Total cost in respect to quantity to obtain the marginal cost.
ThereforeΔ qΔ TC=4+0.2qMC=4+0.2q
ii) Determine the Total revenue from the price function.
Total Revue(TR)=Price(p)× quantity(q)TR=q(15−0.3q)=15q−0.3q2
Differentiate the function to obtain the Marginal Revenue.
MR=Δ qΔ TR=15−0.6q
iii) To determine the maximum production quantity then, the Marginal Revenue(MR) =Marginal Cost(MC)
Therefore 15−0.6q=4+0.2qq=13.5
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