Manhattan GMAT SC Guide - Odds & Ends

[bruno_torres_gomez]

In page 194 of the SC Guide(8), the example at the bottom of the page says that is right:

"The term "eureka", meaning "I have found it" in ancient Greek, WAS famously uttered by Archimides, AND ever since then, scientists have exclaimed the same word upon making important discoveries. "

I see that the , before AND is joining two main clauses, but i don't quite see the point of the comma after then. What's the purpose of the comma after then ?

[RonPurewal]

It's not technically necessary"”but, if it's removed, the sentence becomes much harder to read.

Note that this issue is an issue of (a) punctuation AND (b) style.
The GMAT doesn't test either of those things"”at all, ever"”so this is a non-issue for the exam.

[shrayt345]

The term eureka meaning i have found it in anient greek uttered by archimidies...In this particular sentence why uttered is not considrered as a verb.why do we need was as a prefix to make it as a full action verb?aren't past participle alone not suffice to work as verb
Thanks
Shray

[RonPurewal]

this is the wrong folder for questions about MPrep material. please post any such questions in the "Manhattan GMAT non-CAT" folder.
thank you.