A certain alloy contains 5.25% copper. How much copper is in a piece weighing 200 pounds?
A. 1.05 pounds
B. 105 pounds
C. 10.5 pounds
D. 1050 pounds.
Please explain your answer. Thanks
2007-06-06 15:23:40 · 3 answers · asked by Felicia 4 in Science & Mathematics ➔ Mathematics
100% contain 5.25% copper
100 Pound contain 5.25 pound copper
200 Pound contain 5.25* 2 pound copper = 10.5 pound of copper .so answer is (c)
2007-06-06 16:43:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
(5.25 / 100) x 200 lbs
5.25 x 2 lbs
10 . 5 lbs
ANSWER C.
2007-06-07 02:26:44 · answer #2 · answered by Como 7 · 0⤊ 0⤋
Since it's 5.25% you multiply 200 by .0525 (percentage is out of a 100, 5.25/100 = .0525).
200 x .0525 = 10.5
Therefore, your answer is C. 10.5 pounds.
2007-06-06 15:29:22 · answer #3 · answered by Illos 1 · 1⤊ 1⤋