Which of the following numbers belong to the set of complex numbers and the set of imaginary numbers? select all that apply.

3i

-5i

6-i

square root of 21

negative square root of 16

square root of -14

What is the first step of an indirect proof of a number that is divisible by two

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

What’s the answer? and how do i solve it ?