Answer:
A golf ball is more dense, because the matter is similar in volume, but different. Density units come from you dividing mass units by volume units.
"although the sun was shining, it wasn't that warm" is the correct answer because it contains a main clause (it wasn't that warm) and a prepositional phrase (although the sun was shining,). Hope this helps :)
7x20=140
7x2,000=1,400
Just add zeroes basically.