Which biconditional is not a good definition? a) an angle is straight if and only if its measure is 180. b) a whole number is even if and only if it is divisible by 2. c) a whole number is odd if and only if the number is not divisible by 2. d) a ray is a bisector of an angle if and only if it splits the angle into two angles

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655