Tutoring college math, complex numbers will likely arise. The tutor mentions using Excel. Square roots of negative numbers (aka, complex numbers or imaginary numbers) may not be encountered by many high school students. However, in college math they are used, …

Math: Excel: square roots of negative numbers Read more »

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Tutoring, I drink coffee. (What academic doesn’t?) The tutor gives a hint for those who microwave coffee but drink it black. I’ve been told that, when you microwave a cup of liquid, an air bubble can develop beneath the surface. …

Lifestyle: microwaving coffee or tea: a safety precaution Read more »

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Tutoring English, unfamiliar, two-syllable words are always great finds. The tutor shares parlous. I thought parlous would be related to talking, but it’s not at all. parlous: dangerous; risky She views cliff-jumping as a parlous activity. Source: Merriam-Webster. The Merriam-Webster …

English: vocabulary: what does parlous mean? Read more »

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