When I was a child, there was a commercial on (black and white) TV that had a very happy woman telling a friend about some beauty product, and then that friend told several friends about it, "and so ...

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Suppose you saw in the news that there was a new disease, and one person was hospitalized with it. There had been no hospitalizations before today—and yet, there had been 12,800 positive tests today ...

One of the concepts I teach in my Quantitative Reasoning class is the idea of “Exponential Growth.” Such growth, where a variable grows by a fixed percent, is found in such things as population growth ...