We have to identify the rational function among the given functions.
Rational function is a function that is the ratio of two polynomials. It is rational because one polynomial is divided by the other polynomial, like a ratio.
1. Consider the first function 
, since it is not a function that is the ratio of two polynomials. So, it is not a rational function.
2. Consider the second function 
, since it is not a function that is the ratio of two polynomials. So, it is not a rational function.
3. Consider the third function 
, since it is not a function that is the ratio of two polynomials. So, it is not a rational function.
4. Consider the fourth function 
, since it is a function that is the ratio of two polynomials (x+2) and (5x). So, it is a rational function.
So, Option D is the correct answer.
90 + 3 + 4 = 97
Your answer is 97.
5-(-4)+2 should be the expression
Answer: ![-3x^{2} y\sqrt[3]{2y}](https://tex.z-dn.net/?f=-3x%5E%7B2%7D%20y%5Csqrt%5B3%5D%7B2y%7D)
Step-by-step explanation:
F(x) = 20000 (1-0.15) power x
So
f(x) = 20000 (0.85) power x
