The force F (in pounds) required to push a sofa across a floor varies directly as the weight w (in pounds) of the sofa. Complete parts (a) through (c) below.
a. A person can push a 90-pound sofa across a wood floor by pushing with a force of 25 pounds. Find an equation that describes the relationship between w and F. the answer is F=5/18w. then asks: How much force is required to push a 189-pound sofa across a wood floor?

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You need to understand what the variable means, so weight (W) here is the 189 pound sofa

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