Answers and explanations:
1) A modification problem takes places when creating a database two different type of information is entered in the same chart row generating inaccuracy. The only form to solve this issue is creating a new row so each piece of information will be stored in one row particularly.
2) There are three (3) types of modification problems: the deletion problem (<em>the single row containing information from different themes can be deleted losing data</em>), the update problem (<em>new information entered could lead to more inconsistency</em>), and the insertion problem (<em>similar to deletion, a new row can be inserted instead of the row causing problem but information will be missing</em>).
False. A great example would be North Korea compared to the United States. In the United States we have the Freedom to Speech so we also have the the opportunity for news and social media where you can post pretty much anything. North Korea on the other hand lacks informing their own people and their own people lacks a stable and healthy government. We don’t know a lot about North Korea and they don’t know anything at all about us or the rest of the world.
Answer
The answer and procedures of the exercise are attached in a microsoft excel document.
Explanation
Please consider the data provided by the exercise. If you have any question please write me back. All the exercises are solved in a single sheet with the formulas indications.
The question is incomplete. The complete question is :
A manufacturer believes that the cost function : 
approximates the dollar cost of producing x units of a product. The manu- facturer believes it cannot make a profit when the marginal cost goes beyond $210. What is the most units the manufacturer can produce and still make a profit? What is the total cost at this level of production?
Solution :
Given the cost function is :
Now, Marginal cost = 
So, if the marginal cost = $ 210, then the manufacturer also makes a profit and if it goes beyond $ 210 than the manufacturer cannot make a profit.
Therefore, we have to equate : 
So when x = 45, then C(x) = $ 8042.5
Therefore, the manufacturer 
to 45 units and 
This leads to a total cost of $ 8042.5
Answer:
C) performance of the contract is commercially impracticable.
Explanation:
Contract law contemplates certain situations where performing the contract is either difficult or impossible and therefore the party is not liable for breaching the contract.
Commercial impracticability applies to contracts where the performance of at least one party is impracticable and cannot be accomplished.
In this case, Quinn cannot perform his duty since the price of scrap steel increased beyond any reasonable price contemplated in the contract. Since Quinn is not responsible for setting the price of scrap steel, he is not liable for breaching the contract.
