An application of a rational function is T

An application of a rational function is T -...

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An application of a rational function is T = (AB)/(A+B), which gives the time, T, it takes for two workers to complete  task.   Estimate how long it takes you to complete a task of your choice (house cleaning, mowing, etc.) in a given week.  Suppose that Joe is slower than you at the given task and takes twice as long as you do. If you work together, how  long would it take you to complete the task?
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