# math

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A SERVING TRAY MADE OF BRASS WEIGHS 21 OUNCES. THIS BRASS IS AN ALLOY OF 70 PERCENT COPPER AND 30 PERCENT TIN. WHAT IS THE WEIGHT IN COPPER?

70% OF 21 OZ= 30Z

• math -

No.

Multiply: 0.7 * 21 = ?

• math -

You have it set up correctly, but think on your calculations: How can seventy percent of 21 ounces be MORE than 21 ounces?

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