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Comment Re:iPad books cost less? (Score 4, Informative) 396

Many professors hardly ever use their textbooks, making having the things a waste. Not only do they not know the cost (which they could easily look up if they ever cared to), but they listed as required a book that was never opened. It's one thing if you require and use a textbook; it's an entirely different story if you never even use it.

For example, when I took Calculus III, we never even opened the textbook once. All lessons were done old school with a chalkboard and overhead projector. We didn't even use the book for assignments; we were given homemade worksheets and electronically posted problems. It was the same for the previous two courses: We never cracked the book open except for a single instance in Calc I.

Comment Re:Or you never visualized them in the first place (Score 1) 845

One way to convert if you can't remember the scale is that 32 F = 0 C and that -40C = -40F. With those two points, you should be able to figure it out from there. Set the X value to be the degrees in F, Y to be degrees in C. So you have (32, 0) and (-40, -40). Slope is (Y1 - Y2) / (X1 - X2). Slope intercept form is y = mx + b, where B = y - mx.

So, we end up with m = 40 / 72. Let's pick (32, 0) to solve for b:

0 - 40/72 * (32) = -1280 / 72, which is roughly -17.7.

So we have now, Celsius = (40/72) Fahrenheit - (1280 / 72)

Plug in 212 (boiling point of water in F) and you get back 100. Easy check.

With a calculator, this is fairly trivial to solve, as many calculators will even give you this form of the equation if you just know those two points.

TI 83 you can go:


Put the X values in L1, put Y values in L2

Hit STAT again, then go to CALC

Press 4

Hit ENTER and there you go, you now have the slope and intercept solved for you, you just need to know how to apply it.

Comment Re:spin. (Score 5, Informative) 523

Not exactly:

I, (NAME), do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic;that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God.

Later, of course, you swear loyalty to the President, your officers, UCMJ, etc., but I suppose one could argue that since this part of the oath comes first, if there is a conflict between the former and the latter, this part would be more pertinent.

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