Solve the problem.Tim and Judy mix two kinds of feed for pedigreed dogs. They wish to make 21 pounds of feed worth $0.88 per pound by mixing one kind worth $0.77 per pound with another worth $0.96 per pound. How many pounds of the cheaper kind should they use in the mix? Round your answer to the nearest pound, if necessary.
A. 9 lb
B. 12 lb
C. 17 lb
D. 11 lb
Answer: A
Mathematics
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