- Birch Bay is a protected bay of the east shore of the Salish Sea, between Semiahmoo Bay and Lummi Bay; approximately 100 miles (160 km) north of Seattle and 35 miles (56 km) south of Vancouver, BC, Canada.
- Real number (Wikipedia)
In mathematics, a real number is a number that can be used to measure a continuous one-dimensional quantity such as a distance, duration or temperature. Here, continuous means that pairs of values can have arbitrarily small differences. Every real number can be almost uniquely represented by an infinite decimal expansion.
