Math help?? 10 pts. best answer!?

  • Thread starter Thread starter Furbi F
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Furbi F

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I really don't understand this...
Please help?

3) A solution containing 30% insecticide is to be mixed with a solution containing 50% insecticide to make 200 liters of a solution that is 42% insecticide. How much of the 30% solution can you use?

4) A 50 gallon barrel of milk is 4% butterfat. How much skim milk must be added to make a milk that is 1% butterfat?

5) A candy store mixes plain and peanut m&ms. The plain cost $2.50 per pound and the peanut cost $3.00 per pound. How many of each should they mix to make a 5 pound mixture that they can sell for $2.70 per pound.

Even helping me out with one problem would be great.
thanks! (:
 
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