The prevalence of thyroid cancer has been shown to be similar in patients with a solitary nodule and patients with multiple nodules [30]. In glands with multiple nodules, the recommendation of the American Thyroid Association (ATA) is to biopsy nodules that are >10 mm and those that have suspicious features [15].
Rational Numbers: Any number that can be written in fraction form is a rational number. This includes integers, terminating decimals, and repeating decimals as well as fractions. An integer can be written as a fraction simply by giving it a denominator of one, so any integer is a rational number.
Irrational numbers are numbers that can be written as decimals but not as fractions. An irrational number is any real number that is not rational. By real number we mean, loosely, a number that we can conceive of in this world, one with no square roots of negative numbers (such a number is called complex. ).