Step-by-step explanation:
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Reason number 1 (before) is that you could contaminate your samples if you have foreign material on your hands.
Reason number 2 (after) is that you could spread<span>/or ingest dangerous chemicals or substances that you have handled in the lab.</span>
2 for every 4 = 1 for every two, so 28 multiplied by two. Your answer is 56.
Answer:
b on edge
Step-by-step explanation:
(x axis 4) y inter -3
