You own a portfolio that is composed of stocks and bonds. You decided to add a cryptocurrency to the portfolio. Four major cryptocurrencies are available in the market and they are BTC (Bitcoin), ETH (Ether), XRP (Ripple), and LTC (Litecoin). You are going to allocate 10 percent of the portfolio to only one of these cryptocurrencies. Before investing the funds in a cryptocurrency, you estimated the expected return of the overall portfolio and the standard deviation of returns of the portfolio. The Table shows you those numbers (ER means expected return; SD means the standard deviation of returns; RF stands for the risk-free rate of return). RF = 3%.
Which combination will to select and why?
ER SD
Original Portfolio + BTC 18% 7%
Original Portfolio + ETH 21% 12%
Original Portfolio + XRP 34% 20%
Original Portfolio + LTC 15% 9%

Afreezer manufacturer might purchase sheets of steel, wiring, shelving, and so forth, as part of its final product. this is an example of what sub-classification of business market?

Employees at a library check out books to patrons. books have an isbn and a name. the library sometimes has multiple copies of the same book. books have one or more authors. a patron is an individual who has an active (non-expired) library card. for each library card, we store the person's first and last names and their address. for each employee, we store their employee id, current salary, first and last name and their address. we also store the employee id of their current manager. each time we check out a book to a patron we need to store the date of the transaction, the employee who checked out the book to the patron, and the library card of the patron. some employees have library cards. if an employee patron turns in a book late, the fine that they pay is a percentage of their salary. some employees are authors who have library cards—they are allowed to check out as many books as they like.

Aproduction line has three machines a, b, and c, with reliabilities of .96, .86, and .85, respectively. the machines are arranged so that if one breaks down, the others must shut down. engineers are weighing two alternative designs for increasing the line’s reliability. plan 1 involves adding an identical backup line, and plan 2 involves providing a backup for each machine. in either case, three machines (a, b, and c) would be used with reliabilities equal to the original three. a. compute overall system reliability under plan 1. (round your intermediate calculations and final answer to 4 decimal places.) reliability b. compute overall system reliability under plan 2. (round your intermediate calculations and final answer to 4 decimal places.) reliability c. which plan will provide the higher reliability? plan2plan1