Calculate a baseball player's batting average. Calculating a baseball player's batting average is not a difficult task at all. A batting average represents the percentage of at bats that result in hits for a particular baseball player. The formula is: That's all there is to it.
To fly under the radar means to act in a way so as to actively avoid detection. It is the opposite of 'in your face'. There is an element of getting away with something but it is not necessarily bad.
the male of the honeybee and other bees, stingless and making no honey. an unmanned aircraft or ship that can navigate autonomously, without human control or beyond line of sight: the GPS of a U.S. spy drone. (loosely) any unmanned aircraft or ship that is guided remotely: a radio-controlled drone.