the diagram shows a sector of a circle with centre o. the radius of the circle is 8cm. PRS is an arc of the circle. PS is a chord of the circle. Angle POS= 40°​

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Rotenone is an insecticide that is toxic

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.