Which situation is an example of an observational study?
2 answers:
Answer:
s
Step-by-step explanation:
Answer:
D- Recording the reaction time of participants in a study who were asked to press a button as soon as they see a certain picture on a screen.
Step-by-step explanation:
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Answer:
8
Step-by-step explanation:
0.5x-7=3
add 7 to both sides
0.5x=4
multiply both sides by 2
x=8
8/50 = 16/100 = <span>0.16, which is your answer.</span>