How many gallons of milk that is 10 percent butter-fat must be added to 8 gallons of milk that is 30 percent butterfat to obtain milk that is 20 percent butterfat? Choose the correct choice from the following:
A) 6
B) 8
C) 14
D) 16
E) 28
Equate the fat:   0.1x + 0.30*8 = 0.2(x + 8) --&gt; x = 8.   Answer: 8.
<result>B</result>
How many gallons of milk that is 10 percent butter-fat must be added to 8 gallons of milk that is 30 percent butterfat to obtain milk that is 20 percent butterfat?