Answer:
The correct answer would be option D, Focus their thinking on the essence of the problem at hand.
Explanation:
An economist is a person who has expertise or who is an expert in the field of Economics. The Economists make assumptions about the economies to focus their thinking on the essence of the problem they have at the moment. They predict the economy, they analyze the economy, they suggest solutions to the problems concerning the economy on the basis of their experience and the new studies being carried up by them. So for this purpose they make assumptions because they want to clearly analyze the situations and want to see what impact their decision will make on the economy, which give them a clear picture about the possible solutions of the problem they have at hand at the moment.
Answer:
The correct answer is letter "D": secondary.
Explanation:
Secondary data is the information gathered by other individuals or organizations and is used as a reference in studies or researches. This type of data is typically easy and cheap to obtain because does not imply establishing a team to collect the information needed and can be found in accessible places such as libraries or even on the internet.
Answer:
The correct answer is:
0.50 (B)
Explanation:
The Lerner index is used by monopolists to measure market/monopolist power, and it is defined as the percent markup of price over marginal cost.
It is given by the formula:

Note: in a perfectly competitive market, L = 0, which makes Price = Marginal cost in the equation above. But in a competitive market, it is always the case that L ≥ 0
Answer: cold and warm air masses interact in an unstable environment.
Explanation: Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of producing anything from cloudiness and mild showers to heavy gales, thunderstorms, blizzards, and tornadoes. These types of cyclones are defined as large scale (synoptic) low pressure weather systems that occur in the middle latitudes of the Earth. In contrast with tropical cyclones, extratropical cyclones produce rapid changes in temperature and dew point along broad lines, called weather fronts, about the center of the cyclone .According to the polar-front theory, extratropical cyclones develop when a wave forms on a frontal surface separating a warm air mass from a cold air mass. As the amplitude of the wave increases, the pressure at the centre of disturbance falls, eventually intensifying to the point at which a cyclonic circulation begins. The decay of such a system results when the cold air from the north in the Northern Hemisphere, or from the south in the Southern Hemisphere, on the western side of such a cyclone sweeps under all of the warm tropical air of the system so that the entire cyclone is composed of the cold air mass. This action is known as occlusion.Extratropical cyclones arise through a process called cyclogenesis, in which cold and warm air masses interact in an unstable environment.
Answer:
Balance sheet is the correct answer because it tells about the worth of company, its assets, shareholders funds (Equity) and amount borrowed by the company (Liability). Balance sheet is also known as Statement of Financial Position (SOFP)
All the other options tells about the earnings and costs of the company not about the assets and liabilities of the company.