If you use more than one independent variable at a time, and will observe a change, you will not know which variable contributed to a changed result.
Jane can do a few things to prevent the spread of illness:
- Avoid coughing on others
- Keep a good distance away from those who are not sick
- Sanitize regularly
- Use a tissue for runny nose
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The answer is A because they need the sunlight to go through the water
Volumes.
If you put equivalent volumes in a bag, where both weigh the same, the density might get equal.
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