The production function for a competitive firm is Q = K.5L.5. The firm sells its output at a price of
$10, and can hire labor at a wage of $5. Capital is fixed at one unit. The profit-maximizing
quantity of labor is:
A. 2/5.
B. 1.
C. 10.
D. None of the answers are correct.

please explain in details

Read the following scenario and answer the question in 5-10 sentences. you are the owner of a small business that is a defendant in a lawsuit in federal court. you received bad news from your lawyer that the judge did not allow certain documents to be admitted as evidence in court and that the jury reached a $50,000 verdict in favor of the plaintiff. your lawyer tells you that it is within your legal right to hire him to file an appeal with the united states court of appeals. if the appellate court rules in your favor, you may be able to avoid paying part or all of the $50,000. evaluate your lawyer’s suggestion about appealing the decision.

Your subscription to investing wisely weekly is about to expire. you plan to subscribe to the magazine for the rest of your life, and you can renew it by paying $85 annually, beginning immediately, or you can get a lifetime subscription for $620, also payable immediately. assuming that you can earn 6.0% on your funds and that the annual renewal rate will remain constant, how many years must you live to make the lifetime subscription the better buy?

Which of these is an example of innovation?