In the third century BCE, Apollonius of Perga asked how many circles one could draw that would touch three given circles at exactly one point each. It would take 1,800 years to prove the answer: eight ...

Dr. James McCaffrey presents a complete end-to-end demonstration of linear regression with two-way interactions between predictor variables. Standard linear regression predicts a single numeric value ...

In our personal lives, and on a global scale, we face challenges that test our emotional mettle — injury, illness, unemployment, grief, divorce, death, or even a new venture with an unknown future.

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Listen to more stories on the Noa app. Lately, chatbots seem to be using more sophisticated tactics to keep people talking. In some cases, like my request for headache tips, bots end their messages ...

DIRECTV is a direct broadcast satellite provider that transmits to homes throughout the United States and the Caribbean. There are many different packages to choose from, each offering a variety of ...

Katrina Ávila Munichiello is an experienced editor, writer, fact-checker, and proofreader with more than fourteen years of experience working with print and online publications. Investopedia / Lara ...

In the United States, a Black person is 3.73 times more likely to be arrested for marijuana possession than a white person is, despite approximately equal rates of use.