Answer:
The correct answer is option B.
Explanation:
In a competitive industry there is no restriction on entry or exit of firms in the market. So, when in the short run the firms are enjoying super normal profits or positive economic profits, this would attract potential firms to join the industry in the long run.
As a result the industry supply will increase in the long run. The increase in supply would cause the price to fall. This would further contribute in reducing revenue and profit.
This process will continue till the profit is reduced to zero. If profit falls below zero, then firms incurring loss will exit the industry. Then again zero profits will be restored by reduction in supply and increase in price.
So, we can say that perfectly competitive firms will have zero economic profits or only normal profits in the long run.
Answer:
B. Make sure each main point is brief
Explanation:
Based on the answers provided within the question it can be said that answer that is not an effective principle for preparing main points is making sure each main point is brief. Main points need to be emphasized and thoroughly detailed as they are the most important aspects in a presentation. Only the subtopics may be made brief.
Alcohol is most effective when used as a 70% solution.
Answer:
Long run real GDP will remain unchanged.
Explanation:
The increase in personal taxes (-$20 billion) would offset any increase in real GDP generated by the increase in private consumption ($20 billion). Nominal GDP can be affected and increase by $20 billion, but the effect would be given by an increase in general price level (inflation), not by an increase in real money.
