1.There was no break between the breakfast and lunch crowds, so Zach's first break was around 2:00.

2.Then he made some notes for the owner, Melanie, who was also the cook on the second shift.

I think the compound sentence is the 1st sentence

Yes, you're right.

Thanks

That is correct. The first sentence "There was no break between the breakfast and lunch crowds, so Zach's first break was around 2:00" is a compound sentence.

Actually, the compound sentence in the given context is the second sentence: "Then he made some notes for the owner, Melanie, who was also the cook on the second shift."

A compound sentence consists of two independent clauses connected by a coordinating conjunction (such as "and," "but," or "so"). In this case, the coordinating conjunction "who" is connecting the two independent clauses: "he made some notes for the owner, Melanie" and "Melanie was also the cook on the second shift." The conjunction "who" is used here to introduce additional information about Melanie's role as the cook, connecting the two independent clauses in the sentence.