After you learn how to calculate standard deviation and what it can tell you, the next logical step is to find out when this concept becomes useful. So, where is standard deviation used in real...

Standard deviation is used often in statistics to help us describe a data set, what it looks like, and how it behaves.  However, this raises the question of how standard deviation helps us to...

Imaginary numbers may not sound very useful, but they appear in a wide variety of topics in mathematics.  Not only are they useful in theory, but they have some applications in the math that...

When working with sequences of numbers, it helps to be able to recognize patterns.  Some of them are arithmetic or geometric, and some are linear or quadratic. So, what is a quadratic...

Right triangles are important in many area of mathematics, including geometry, trigonometry, and calculus (that’s just for starters!)  However, there are lots of questions that you might have...

We often hear about multiplicative functions in number theory, and they are useful when working with prime numbers.  So, it helps to know what they are and how to use them. So, what is a...