In the image CD is the perpendicular bisector of AB. If the measure is ED is 6 inches which of the following statements is true

The 5th term in a series of even number that begin 3x

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic