Use a polar coordinate system to plot the point with the given polar coordinates. Then find another representation ​(r, theta​) of this point in​ which: ​ (a) rgreater than​0, 2piless thanthetaless than4pi. ​

(b) rless than​0, piless thanthetaless than3pi.

​(c) rgreater than​0, minus2piless thanthetaless than0.

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −