CHAPTER 4  Objective 6.1  Exercises

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1.  How many pounds of cheese which cost $3.80 per pound must be mixed with 16 lb of cheese which cost $2.40 per pound to make a grated cheese topping which costs $3.00 per pound?

2.  A gardener has 10 lb of grass seed which cost $.80 per pound. How many pounds of a grass seed which cost $1.20 per pound should be mixed with the 10 lb of grass seed to produce a mixture which sells for $1.10 per pound?

3.  Find the selling price per ounce of a face cream mixture made from 80 oz of face cream which cost $4.20 per ounce and 120 oz of face cream which cost $2.60 per ounce.

4.  A 110-pound bag of animal feed is 30% oats. How many pounds of oats must be added to this feed to produce a mixture which is 45% oats?

5.  Forty-five ounces of pure grapefruit juice is added to 30 oz of a fruit punch which is 15% grapefruit juice. What is the percent concentration of grapefruit juice in the resulting mixture?

6.  A clothing manufacturer has some fiber which is 25% polyester and some which is 55% polyester. How many pounds of each fiber should be woven together to produce 30 lb of a fabric which is 35% polyester?

7.  A baker mixed some flour which was 30% wheat with 100 lb of flour which was 45% wheat to make a mixture which is 36% wheat. How many pounds of the 30% wheat flour were used?

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