Question

There is firm in a perfectly competitive market and we know the followings p = 70 \mathrm{TC}=2 \mathbf{q}^{2}-\mathbf{3 0 q}+\mathbf{4 0 0} ; \mathbf{M C}=\mathbf{4} \mathbf{q}-\mathbf{3 0} What is the profit maximizing quantity? What is total profit of the firm? What will happen in the long run in the market?

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