b. a representation of a theory or a part of a theory
Explanation:
A model is different from theory because is a more applied and empirical representation of a situation while the theory is more abstract. An economic model is a simplified prediction of a complex and real economic behavior, it uses variables to analyze different scenarios, it also uses logical and quantitative relationships between economic processes, is usually mathematical. <em>The results of these models can lead to a new investigation, theorization or to prove theories.</em>
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When the job applicants for specific jobs are told to perform a sample of the job, this implies that the company is using a performance test.
Performance test simply refers to a test that requires the individuals partaking in it to perform an activity using their skills, ability and knowledge.
The gross premium is the total premium paid by the policy owner, and generally consists of the net premium plus the expense of operation minus interest
Calculating volumes by water displacement is always more accurate than using mathematical formulas when the objects have irregular shapes or it is difficult to measure them exactly. The only thing that you must keep in mind is measuring the water displacements properly. One ml of water equals 1 cm³, so if the water level increased by 5 ml, then the object's volume is 5 cm³.
