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If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Evaluate the expression. (9 + 5)(3 + 2)0