Lawrence produces three grades of commercial fertilizers. A
100-lb bag of grade A fertilizer contains 18 lb of nitrogen, 4 lb
of phosphate, and 5 lb of potassium. A 100-lb bag of grade B
fertilizer contains 20 lb of nitrogen and 4 lb each of phosphate
and potassium. A 100-lb bag of grade C fertilizer contains 24 lb of
nitrogen, 3 lb of phosphate, and 6 lb of potassium. How many 100-lb
bags of each of the three grades of fertilizers should Lawnco
produce if the following is true? (a) 37,600 lb of nitrogen, 7,300
lb of phosphate, and 9,000 lb of potassium are available and all
the nutrients are used. grade A fertilizer bags grade B fertilizer
bags grade C fertilizer bags (b) 22,000 lb of nitrogen, 4,200 lb of
phosphate, and 5,200 lb of potassium are available and all the
nutrients are used. grade A fertilizer bags grade B fertilizer bags
grade C fertilizer bags