This article is a profile, not an obituary (I'd expect an obituary to state that she died, and give a date). What's the source that reported her death? I searched the web, but couldn't find any. At the moment, her Wikipedia article refers to her in the past tense, but doesn't cite a source for her death either.
(In case the title changes, this comment refers to the original HN title: "Lorinda Cherry, author of dc, bc, eqn has died".)
It was reported on a mailing list of ex-Bell labs staff and other early UNIX users. This write up of her career was the best one I could find, sourced from information there. It's from 2018 when she got an award. If you have a better one I'd welcome it being posted.
(In case the title changes, this comment refers to the original HN title: "Lorinda Cherry, author of dc, bc, eqn has died".)