Answer: the answer would be To make sure they remain effective.
Step-by-step explanation:
It wouldn't be to make sure they are up to code because fire extinguishers do not use code, code is used in electronics. For the second option and the last option it would not be this because they could be trained in a practice instead of using the real thing.
Answer:
yes
Step-by-step explanation:
you can tell because all of the x-values are different, or they dont repeat. a function is no repeating x-values.
