- Derivative (Wikipedia)
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.
- Seattle–Tacoma International Airport (Wikipedia)
Seattle–Tacoma International Airport (IATA: SEA, ICAO: KSEA, FAA LID: SEA), branded as SEA Airport and also referred to as Sea–Tac (/ˈsiːtæk/), is the primary commercial airport serving the Seattle metropolitan area in the U.S. state of Washington. It is in the city of SeaTac, which was named after the airport’s nickname “Sea-Tac”, approximately 14 miles (23 km) south of Downtown Seattle and 18 miles (29 km) north-northeast of Downtown Tacoma. The airport is the busiest in the Pacific Northwest region of North America and is owned by Port of Seattle.
