Respuesta :
The answer is -3.
To maximize its profit, a monopoly should choose a price where demand is elastic. A monopolist maximizes profit at the point where MR = MC. The marginal revenue for a monopolist is given by:
marginal revenue = change in total revenue/change in output.
When the demand is elastic, (e > 1), marginal revenue is positive and when the demand is inelastic (e < 1), marginal revenue is negative. When demand is unitary elastic (e = 1), marginal revenue is zero. Therefore, a monopolist should produce and maximize profits at the point where demand is elastic.
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