Correct answer is the 3rd one.
Answer:
The answer is a well designed experiment.
Step-by-step explanation:
When possible, the best way to establish that an observed association is the result of a cause and effect relation is by means of - well designed experiment.
Cause and effect relation is a relation between events, where one is the result, due to the occurrence of others. A well designed experiment takes place when we consider the cause and effect of events.
Irrational due to the negative sign
Answer:
its is either 339.3 or 1357.2
Step-by-step explanation: