variables
Math is a way of modeling circuits. Once you have a mathematical model of a circuit, you can start to vary the math which is much easier than building the circuit and varying the hardware. Today, computers do much of the math.
Applied mathematics focuses on the application of mathematical principles to real world problems, and even some abstract problems. Engineering, theoretical physics, and computer science all make use of applied mathematics, and frequently firms of these types will employ mathematicians to supplement their group of employees. I.e. some video game developers employ mathematicians for complex physics modeling equations. Some physicists seek the help of mathematicians to provide rigorous proofs and other mathematical support for abstract concepts. Pure math is the study of math, with the goal being the improvement of the foundations or concepts of math. Pure math is the study of the underlying mechanisms that cause mathematical techniques to work, the improvement and justification of these techniques and development of new techniques all fall under pure math. I.e. developing a substitute for traditional trigonometry would be pure math(chose that example because someone recently did that). They also analyze abstract math problems and see what concepts could apply to them or why they work. The *are separated for the same reason physics and engineering are separated. It would be less efficient to focus on both the development of mathematical concepts and ways to apply these concepts to the real world. Too much workload for most students. In the same vein a physicist doesn't have time to learn all the technology and applications of physics to eliminate the job of an engineer, even though the physicist probably has a better understanding of the physics that the engineer would use on a daily basis. I'm sure there are places to improve this answer. Please feel free.
A concept is an idea or an abstraction that stands for something. A concept becomes a variable when it is made operational or when it can be counted, categorized, or observed. For example, job satisfaction is a concept, but, it becomes a variable when a definition is it attached to it that makes it measurable. You may ask a married person, "how satisfied are you with your job?" If you attach levels of satisfaction to it, then it becomes a variable. All variables are concepts when you can measure the concept. However, not all concepts can be variables. A concept that is not a variable is a concept that is not measurable.
It can be used as an adjective: a plum job
Veterinarians have, on average, moderate job security - if they are competent at their job and are in a clinic with a solid business plan, they can be relatively confident that they will have a job as long as they want it. However, changing demographics and economic realities have forced veterinarians to close clinics and relocate, particularly large animal veterinarians in the Midwest, Plains and Rocky Mountains.
Yes veterinarians must like animals to do a good job.
the have an extremely high satisfaction in their job.
Yes
yes.
Many veterinarians enjoy helping animals and their owners by working to ensure the animal is healthy.
I can't write your essay for you as this is your job, but you can include concepts such as the mathematical relationships between statistics and the world, how it keeps our economy stable, things like that.
threating the sick and wounded animals
Yes, veterinarians can and do get hurt treating animals. Small animal veterinarians tend to have needle sticks, slips/falls, bites from aggressive animals. Large animal veterinarians also have needle sticks and slips/falls, but are at more risk for injury from exposure to the elements and kicks from animals.
Yes, a veterinarian's ability to perform their job competently often does affect their income. This is particularly true when veterinarians are paid on a commission basis.
In the Great Recession some positions have been harder to find, but overall there are less veterinarians graduating than there are positions looking for veterinarians to fill them.
$50,000, but it may vary due to job location and experience