The professional safety practitioner requires a solid background in mathematics to perform adequately. An exponent can be defined as a quantity representing the power to which some other quantity is raised. Exponents do not have to be numbers or constants; they can be variables. They are often positive whole numbers, but they can be negative numbers, fractional numbers, irrational numbers, or complex numbers. Scientific notation is a mathematical way to express values or numbers too large or too small to be easily written in a standard decimal notation. Engineering notation is a version of scientific notation in which the power of 10 must be a multiple of three. The absolute value of any number is the value of the corresponding arithmetic number that is positive. The Pythagorean equation is used to determine the lengths of any side of a triangle and can be used further to identify the calculated degree of any angle.