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OpenStudy (anonymous):
The number of bags of grass seed, n, needed to reseed a yard varies directly with the area, a, to be seeded and inversely with the weight, w, of a bag of seed. If it takes two 3-lb bas to seed an area of 3000ft2, how many 3-lb bas will seed 9000ft2?
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OpenStudy (anonymous):
can someone help me with this?
OpenStudy (mathmate):
3 lb / 3000 ft^2 = ? lb / 9000 ft^2 Use proportions or cross-multiplication.
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