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Radical Function for polynomials-Real life scenario example

Updated on June 18, 2012
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In college algebra (intermediate algebra) you will have to learn to divide, multiply, add and subtract polynomials. Usually they will be long slews of numbers, however you will more than likely have to show real life situations involving them. But first you may want to know what the heck a polynomial and radical function even are.


In mathematics, a rational function is any function which can be written as the ration of two polynomial functions. Neither the co-efficients of the polynomials nor the values taken by the function are necessarily rational numbers.

In mathematics, a polynomial is an expression of finite length constructed from variables ( also called indeterminates and constants) sing only the operations of addition, subtraction, multiplication and non-negative integer exponents.

Real life scenario with several different variables

I am currently in the market for a stove and before purchasing I would like to figure out the actual per year cost. The cost annually will reflect the initial cost of the unit, as well as electrical useage to run it the span of its lifetime.

As a rational function, it would look like A+(C*B) //B=D

A= Initial purchase price

B=Years of Expected Life

C=Annual electricity cost

(D) annual cost of stove

1.)So if I found a cheap stove for 550 and it would cost 75$ a year to run, for an estimated 15 years, the calculation would look like this.

550+(75*15)//15=111.67

2.)Another stove that cost 1000 with the same electricity cost, but with a life span of 20 years, would look like this below;

1000+(75*20)//20=125

3.)Another one, an energy efficient one sells for 1200 a year, using 50 dollars a year to run with electricity and a 15 year life.

1200+(50*15)//15=130


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