Answer: C
Explanation In any of the answer choices doesn't say tat its possible copper to conduct electricity. But in C its says it can exchange electricity.
The equation for the chi squared value is the (observed-expected)^2/E
~Hello there!
Your question: What is the period of time it takes for a planet to go around the sun?
Your answer: A year is referred to for a planet to go around the sun.
Any questions ^?
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