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anonymous
 4 years ago
Heres another one :D
An alloy of tin and copper contains 16% tin. How much tin (to the nearest tenth) must be added to make 820 pounds of alloy that is 18% tin?
anonymous
 4 years ago
Heres another one :D An alloy of tin and copper contains 16% tin. How much tin (to the nearest tenth) must be added to make 820 pounds of alloy that is 18% tin?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Alloy Tin Before x .16x After 820 820*.18 =147.6 Since we are adding only tin, the difference in weight should be the same 820x = 147.6  .16x .84x = 672.4 x = 800.48 difference = 820  800.48 = 19.52
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