Answer:
quadratic
Step-by-step explanation:
maybe you can try searching in google
Answer:
The correct option is D.) Causation cannot be determined from an observational study.
Step-by-step explanation:
The conclusion is not correct because
D.) Causation cannot be determined from an observational study.
Causation determined from an observational study is speculative and cannot be confirmed without data from a real experiment.
So for this, we can simplify √63 as such:

Using the simplified version of √63, we can solve it:

Zero is your final answer.
The price before the tip was 8 dollars