It's a rational number so it does not fit into those categories.
Extending in scope or effect to a prior time or to conditions that existed or originated in the past; especially : made effective as of a date prior to enactment, promulgation, or imposition
Answer:
This is not surprising because there are about 100 billion stars in our galaxy.
Answer:
No, it is not using passive voice.
Explanation:
for passive structure, the format is:
Object+ are+ being+Verb 3 + Subject
