Florida girl's death brings to light tonsillectomy risks. September 23, 2010|By Lorri Helfand and Letitia Stein, St. Petersburg Times. The recent death of a seemingly healthy, 12-year-old Pinellas County girl following a tonsillectomy may have many parents worried about one of the most common surgical procedures performed in children.
In a perfectly competitive market price is equal to marginal revenue. Price will also equal average cost. If price was greater than average cost the firms in the market would be making profit. This would lead to more firms entering (remember no barriers to entry) until profits are eliminated.
  Answer   Because for a perfectly competetive firm since the demand curve is perfectly elastic even a slightest price change doesnt add any further demand..so there â¦ is no change in marinal revenue also.Since revenue is demand multiplied with cost of unit..the two curves are same.+ 1 other found this useful. Answer   Because for a perfectly competetive firm since the demand curve is perfectly elastic even a slightest price change doesnt add any further demand..so there â¦ is no change in marinal revenue also.Since revenue is demand multiplied with cost of unit..the two curves are same. + 1 other found this useful.