The tutor offers a few points of clarification. In yesterday’s post I showed a Perl program, called from the command line with the input value, to find the cube root of a number. Here are some points to help a …

Perl: some explanation of yesterday’s command-line cube root program Read more »

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The tutor shares a recent discovery. Imagine you want to calculate 8/2×4 The answer should be 1, of course: in a fraction, there are unwritten brackets around the numerator and around the denominator. Unless you have a calculator that accepts …

Calculator usage: Sharp EL-520W: multiplication in the denominator Read more »

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The tutor shares some thoughts about Lovecraft’s short story “The Tomb.” “The Tomb” is classic Lovecraft. First, it centres on an abandoned location connected with former greatness. Second, its narrator develops a connection to the supernatural world. Finally, the narrator’s …

English: Reading: Short Horror: H.P. Lovecraft’s “The Tomb” Read more »

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The tutor covers a day-to-day issue in high school algebra. Consider the following problem: 14=5/(3x) Solution: First, multiply both sides by 3x: 3x(14)=(3x)*5/(3x) The right side is now both divided and multiplied by 3x, so they cancel there: 3x(14)=5 On …

Algebra: solving when x is on the bottom Read more »

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Heading into another biology conference, the tutor offers a prelude about DNA vs RNA. DNA stands for deoxyribonucleic acid; RNA indicates ribonucleic acid. Not surprisingly, both types of molecules are classified as nucleic acids. What are they used for, and …

Biology: differences between DNA and RNA Read more »

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The tutor shows off some of Perl’s pattern matching (aka regex) talents. Let’s imagine you have a laptop you share with a friend for project work. They’re not million-dollar secrets you’re keeping, but on the other hand, you don’t want …

Perl: a password (sort of) using regular expression (regex) power Read more »

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The tutor talks more about how to find the angle in standard position from the reference angle. For my introductory post about this, see here. Let’s imagine you know the reference angle is 71°, but the actual angle is in …

Math: more about angles in standard position and reference angles Read more »

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