posted by AK on .
A certain alloy contains 5.25% copper.
How much copper is there in a piece weighing 200 pound?
i think its D am i right
Can D really be right? The original piece weighs 200 pounds. How can 5.25% of that be more than you started with?
I don't understand . That means i got the wrong answer.
is C the right answer?
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.
Nickel is correct.