There are 2 billion fish in a fish tank. exactly 1 billion of them die. how many fish are in the fish tank?

Ineed some with my spanish. in advance.

Psychology is the study of the mind, biology is the study of living organisms, and archeology is the study of human history. based on this information, what does the suffix -logy most likely mean?

+30 pts (apex) which of these is an essential part of active listening? a. mouthing the words you hearb. not passively listening c. avoiding interruptionsd. not asking too many questions