Which option below best describes the difference between an experiment and an observational study?
1 answer:
An observation study is where nothing changes and you record what is seen. An experimental study you have a control group and a testable group.
The answer would be: .C. The groups in an experiment are chosen at random, but not in an observational study.
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I just know the greatest common factor is 2ab
But i don’t know if it is foil method but I still don’t know how to put it in that format
Square root of 15 is an irrational number.
Answer:
B: -6+2i
Step-by-step explanation:
- 3i + (-6 - i) = ⇒ open parenthesis
- 3i - 6 - i = ⇒ simplify
- -6 + 2i ⇒ answer in standard form of a+bi
s hard and too long I'm only of class 13
The GCF of 15 and 25 would be 5
