How many piano tuners are there in Chicago, USA?

Come up with a series of estimates that will lead to a sensible answer.

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Wikipedia,

Wednesday, August 29, 2018

"Fermi problems are named after Italian-American physicist Enrico Fermi as he was known for his ability to make good approximate calculations with little or no actual data. An example is his estimate of the strength of the atomic bomb that detonated at the Trinity test, based on the distance traveled by pieces of paper he dropped from his hand during the blast. Fermi's estimate was remarkably close to the now-accepted value. A famous example of a Fermi-problem-like estimate is the Drake equation, which seeks to estimate the number of intelligent civilizations in the galaxy. The basic question of why, if there were a significant number of such civilizations, ours has never encountered any others is called the Fermi paradox."

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## Casio Classwiz CalculatorThere is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app). As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols! This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more... |