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02-29-2008, 07:52 PM
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| Can anyone help with 3 math questions????
A serving tray made of brass weighs 21 ounces.This brass is an alloy of 70% copper and 30% tin.What is the weight of the copper in the tray? Express 53 1/3 percent into a fraction in its lowest terms. What percentage of $30 is $6? I get 20% but I'm not sure      |
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02-29-2008, 07:55 PM
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1> Weight of Copper=21*70%=21*70/100=14.7 2> 53 1/3%=53 1/3* 1/100 = 160/300= 8/15 3> 6/30 * 100=20% |
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02-29-2008, 07:55 PM
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Weight of copper=70/100*21 =14.7 ounces 53 1/3%=160/300 =8/15 is/of=6/30*100 =20% |
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