Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Average variable savings rates in the UK have plunged to their lowest levels since mid-2023, according to Moneyfacts’ July 2025 Savings Trends Treasury Report. The average easy-access rate declined to ...

Linear functions are used to model a broad range of real-world problems. The ability to solve linear equations and inequalities is an essential skill for analysing these models. This section covers ...

Thomas Piketty, of the Paris School of Economics, was dubbed the “rock star economist” after his book Capital in the 21st Century was published in 2014. It was remarkable that a 700-page economic tome ...

Microsoft Excel can present two series of data points together on the horizontal axis, but if the number scale for each series dramatically differs, the data will not be readable. Using a two-sided ...

Scientists have found that human beings age at a molecular level in two accelerated bursts – first at the age of 44, and then again at 60. In a study published in the journal Nature Aging, scientists ...

Abstract: In this paper, the problem of stability of systems with a time delay is investigated. The time delay is assumed to vary in an interval, and its derivative is unknown. An augmented ...

The United States has the highest rate of children living in one-parent households anywhere in the world, and experts are increasingly giving more attention to how the low rate of two-parent ...

1 International Center for Equity in Health, Federal University of Pelotas, Pelotas, Brazil 2 Faculty of Nutrition, Federal University of Pelotas, Pelotas, Brazil Introduction: No multi-country ...

Global inequality stems not just from what people have and don’t have—but what they're able to do with what they have. “The levels of inequality are horrendous," said Janet Fuentes, an activist from ...

In this paper we study to solve two-additive α-functional inequality with 3k-variables and their Hyers-Ulam-Rassias type stability. It is investigated in complex Banach spaces. These are the main ...