Posted by AK on Wednesday, July 16, 2008 at 3:32pm.
A certain alloy contains 5.25% copper.
How much copper is there in a piece weighing 200 pound?
A)1.50 pounds
B)105 poounds
C)10.5 pounds
D)1050 pounds
i think its D am i right

Math  DrBob222, Wednesday, July 16, 2008 at 3:36pm
Can D really be right? The original piece weighs 200 pounds. How can 5.25% of that be more than you started with?

Math  Nickel, Wednesday, July 16, 2008 at 3:49pm
I see what you're thinking, you wanted to multiply 5.25 * 200, which would give you 1050. But that would be wrong.
What you need to realize is that the 5.25 is a percentage, so instead of multiplying 200 * 5.25, you need to multiply 200 * 0.0525 and you will get your answer.

Math  DrBob222, Wednesday, July 16, 2008 at 4:05pm
Nickel is correct.
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