Is - two billion dollars is a unit, one unit so it is singular and you use the singular verb
think - scientists is a plural, therefore, you must use the plural verb form of think
I suggest you watch this video. It's only one minute and it explains a lot. Hope this helps!
https://www.khanacademy.org/math/ap-statistics/analyzing-categorical-ap/analyzing-one-categorical-va...
Answer:
yeah sure whats his name and why it's he your fav6
Can’t answer if there’s no stanza to read from
