Why are message board discussions moderated? A.
to rectify spelling and grammar
B.
to delete irrelevant or offensive posts
C.
to facilitate communication between group members
D.
to ensure that discussions topics are interesting

Radar devices are used by law enforcement to be sure that individuals are driving safely. they tell the officer how fast the vehicle is traveling at that specific moment in time. the radar device determines the vehicle's a. instantaneous speed. b. acceleration. c. maximum velocity. d. average speed.