Then you hand back the midterm and realize you messed up question seven. Maybe the picture didn’t make sense; maybe the answer key were wrong; … Read More

A minute later, you have handed back a test paper, and there it stares up at you: a sixty-four percent. You know that’s a C, … Read More

It’s a particular sort of terror when you get your exam back, with class average listed as sixty-five percent. You’re not worried about being bad, … Read More

For example, you’d think that a lengthy password must be safe… but according to concept of entropy, it isn’t. If all 12 characters is the … Read More

Logarithms are extended in text books into long strings of individual terms. That way algebra seems manageable because it breaks complicated expressions down into little … Read More

Logarithms is one of those nasty bits of algebra from high school that make you think, “Ugh, why does everything need to be so dense … Read More

The task of a negative exponent is simple: Take the reciprocal. That’s all this calculator does. Type in your number and negative exponent and it … Read More

Exponents get concrete when you realize they are just shorthand for repeated multiplication, which is essentially its own kind of notation. But like all notations, … Read More

The negative exponent calculator with negatives is like two calculators in one, both what number is the expression equal to, but also why is it … Read More

You are on a test, looking at a quadratic equation. Panic sets in. There’s a jumble of coefficients. Signs is tricky. You remember the formula … Read More