What are the major differences between market-based and planned economies?

Which of the following statements is (are) true? i. free entry to a perfectly competitive industry results in the industry's firms earning zero economic profit in the long run, except for the most efficient producers, who may earn economic rent. ii. in a perfectly competitive market, long-run equilibrium is characterized by lmc < p < latc. iii. if a competitive industry is in long-run equilibrium, a decrease in demand causes firms to earn negative profit because the market price will fall below average total cost.

What is the definition of an entrepreneur

Which are roles of the female reproductive system? check all that apply.releasing urineproducing eggsproducing spermallowing for fertilizationreleasing semenallowing for childbirth