To collect money from an investment is it necessary to sell the investment?

Straight arrow unloaded two tankers worth of toxic waste at an important port in the country of urithmea. a hundred workers worked two days in their shorts and sandals to unload the barrels from the tankers for $5 a day. they were not told about the content of the barrels. some observers felt that it was the obligation of not just the government of urithmea but also of straight arrow to ensure that no harm was done to the workers. these observers are most likely

mark, a civil engineer, entered into a contract with david. as per the contract, mark agreed to design and build a house for david for a specified fee. mark provided david with an estimation of the total cost and the contract was mutually agreed upon. however, during construction, when mark increased the price due to a miscalculation on his part, david refused to pay the amount. this scenario is an example of a mistake.

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.