A coin contains 9 grams of nickel and 16 grams of copper, for a total weight of 25 grams. What percentage of the metal in the co
2 answers:
Answer:
64% of the metal in the coin is copper.
Step-by-step explanation:
A coin contains nickel = 9 grams
and copper = 16 grams.
Total weight of the coin = 16 + 9 = 25 grams
Now we have to calculate the percentage of copper in the coin.
Therefore, × 100
= 0.64 × 100
= 64%
Hence 64% of the metal in the coin is copper.
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<h3>Answer: 7.0 (choice E)</h3>
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Work Shown:
Let m = 2 so we can use this result later.
Let n = 5 so we can use this result later.
Add the two results.
m+n = 2 + 5 = 7.0 is the final answer.