- In mathematics, the derivative shows the sensitivity of change of a function’s output with respect to the input. Derivatives are a fundamental tool of calculus. For example, the derivative of the position of a moving object with respect to time is the object’s velocity: this measures how quickly the position of the object changes when time advances.
- Columbia City, Seattle (Wikipedia)
Columbia City is a neighborhood located in the southeastern part of Seattle, Washington in the Rainier Valley district. It has a landmark-protected historic business district and is one of the few Seattle neighborhoods with a long history of ethnic and income diversity.