Most likely it is a logarithm.
An expression is non polynomial if it has : negative exponent fractional exponent variable exponent in the radicand
written with an exponent
What is the value of the exponent in the scientific notation expression for 0.0000083?
Not necessarily. If the exponent is not an integer then it is not a polynomial.
An exponent is any number denoted in the following manner. 2x where x is an exponent.
The exponent is 1, the coefficient is -5.
Not necessarily. Every exponent in the exponent must be a non-negative integer. This is not what you have specified. For example, if n = 3.5, it is not a term in a polynomial expression.
The exponent would be 10.