Answer:
I think its A
Explanation:
if its every 3 seconds wouldnt it be 3.0 Hz
Answer:
jajajaja sorry no ablaru inglich jajj yes or nou?
Mass is the physical quantity
(C) the government agency that regulates these types of chemicals
They do the method 3 times to be sure. Because if you do it once, that could mean anything. If you do it twice, it may or may not have the same result. If you do it 3 times and it matches one of the previous answers, then it's likely that it's correct.
