How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid to obtain a mixture containing a
40% solution of acid?
1 answer:
Suppose x quarts of the 50% solution
0.5x+0.2*20=0.4(x+20)
0.5x+4=0.4x+8
0.1x=4
x=40
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$1,300
Step-by-step explanation:
commission on the first $10,000
= 4/100 * 10000
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= $28,000 - $10,000
= $18,000
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