German Silver is an alloy composed of nickel, zinc, and copper in a 3:4:13 ratio. How many kilograms of each metal are needed to make 4 kg of this alloy?

Step-by-step explanation:

first lets find the total # of portions:

3+4+13=16+4=20

To make 4kg of this alloy you have to use:

nickel: (4/20)*3=12/20=6/10=0.6 kg

zinc: (4/20)*4=16/20=8/10=0.8 kg

copper: (4/20)*13=52/20=26/10=2.6 kg

answer for #1 is c

answer for #2 is d

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step-by-step explanation: