OneTask#maths
Every post tagged #maths. All posts.
The coffee-to-water ratio, and how to adjust it
What a brew ratio like 1:16 means, the usual ratios for pour-over, French press, AeroPress, moka pot, cold brew and espresso, how many grams go in a mug, and how to fix coffee that tastes weak or bitter.
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Scatter plot or line chart? How to choose
The difference between a scatter plot and a line chart, when joining the points misleads, what a trend line and correlation coefficient tell you, and what to use when there are too many points to see.
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What eDPI means, and why it matters more than DPI for aim
How effective DPI combines mouse DPI and in-game sensitivity, how it relates to the distance for a full turn, typical pro ranges, and how to carry your sensitivity between games.
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What card processing fees really cost, and how to price around them
How a percentage-plus-fixed processing fee works, why it hits small payments hardest, how to gross up a price so you receive an exact amount, and the extra fees that turn up on top.
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How much concrete a slab needs, and how many bags that is
The volume formula for a concrete slab in metric and imperial, how thickness changes the total, how much to add for waste, and how to turn cubic metres or yards into a bag count.
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Converting cups to grams, and why a cup of flour is not a cup of sugar
Why cups measure volume and grams measure weight, how much a cup of common ingredients weighs, the difference between US, metric and imperial cups, and why bakers switch to scales.
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How many words is a five-minute speech?
Typical speaking rates for speeches, presentations, podcasts and voiceovers, how to turn a time limit into a word count and back, and why your own pace matters more than the averages.
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What a kilowatt-hour is, and how to work out what an appliance costs to run
Watts, kilowatt-hours and the numbers on your electricity bill, with the formula for any appliance's running cost, the daily supply charge most people forget, and examples.
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BMI for women, what the number tells you and what it leaves out
How BMI is calculated, the WHO categories, why the same formula is used for women and men, and the things it cannot see, from body fat and muscle to pregnancy and age.
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Finding the tempo of a song, and turning BPM into delay times
How to find a song's BPM by ear, by tapping or with automatic detection, why detectors sometimes report half or double, and how to convert BPM into delay and LFO settings.
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How a weighted average mark (WAM) is calculated, and what you need to hit a target
How universities turn unit marks and credit points into a WAM, why year weighting changes the answer, how WAM differs from GPA, and how to work out the marks you still need.
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How much mulch to order, and how far a cubic yard or metre goes
Work out how much mulch a garden bed needs from its area and depth, how far a cubic yard or cubic metre spreads, and when bags beat a bulk delivery.
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