Circumference pi, is represented by the Greek letter . The first few decimal digits of the numerical value of are 3.141592653589793 ... Pi is defined as the ratio of a circle's circumference to its diameter : Or, equivalently, as the ratio of the circumference to twice the radius. The above formula can be rearranged to solve for the circumference: The use of the mathematical constant is ubiquitous in mathematics, engineering, and science. In "Measurement of a Circle" written circa 250 BCE, Archimedes showed that this ratio (, since he did not use the name ) was greater than 3 but less
Straight from the Heart (Patrice Rushen album) "Straight from the Heart" a "C+" and said that he prefers side one's "dancy vamp" over the songwriting on side two by Rushen, whom he called a fashionable "ingenue". In a retrospective review, AllMusic's Andy Kellman gave it four out of five stars and called it "an early-'80s jazz-pop-R&B synthesis as durable and pleasing as any other". In 2018, Pitchfork ranked Straight From the Heart #194 on its list of the 200 Greatest Albums of the 1980s. Straight from the Heart (Patrice Rushen album) Straight from the Heart is the seventh studio album by American recording artist Patrice Rushen, released