When my students grow too dependent on their calculators, I ask them to find a number that, when multiplied by itself, gives them 2. Students quickly see that since 1² = 1 and 2² = 4, the answer has ...
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Ciara Ottewill is a stickler for accuracy, so she is unhappy with the typical "close" approximations used for the value of numbers like pi. She wanted the numbers to be more accurate yet easy to ...
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