Recognition of the existence of a problem, collecting data, forming tentative hypotheses, and performing experiments to test the hypotheses. It's a. Scientific method b. inference

a. the scientific method

Explanation:

The steps to the scientific method are:

1. Ask a question/Recognize a problem

2. Do research

3. Form a hypothesis

4. Conduct experiments testing that hypothesis

5. Analyze your data

6. Form conclusions

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multiplying and dividing the two decimals and the eqations by the same number of the overalls