.445 karats
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9 mm * 9 mm = 81 mm2 = 0.81 cm2
90. mm
9 m (1000 mm/1 m) = 9,000 millimeters ==============
9x+18y=200*14 x+y=200 y=200-x 9x+18(200-x)=2800 9x+3600-18x=2800 -9x=-800 x=88.9 grams y=111.1 grams x= 9 karat gold y=18 karat gold Answer: 88.9 grams of 9 karat gold must be mixed with 18 karat gold to produce 200 grams of 14 karat gold.
0.3543307087 in Direct Conversion Formula 9 mm* 1 in 25.4 mm = 0.3543307087 in