Optimizing my commute III

[asterroc]

I was reminded by mathsex people that (1) if I assume gas mileage and speed are equally important, that I could just average the optimal speed for both and I get around 65mph for the ideal driving speed, or (2) a potential way of giving a more realistic value to my time as compared to the gas mileage is to put a dollar value on my time - according to my salary that's around $20/hr. More math to come...

Comments

[gemini6ice.livejournal.com]

In response to your icon, the math department at neu had this fun solution:

1/n * sin x = 1/n * sinx = 1 * six = 1 * 6 = 6!

6!

[best-ken-ever.livejournal.com]

But, gemini6ice, how can 6 = 6! possibly be true?!?! The only integral solutions to x=x! are {1,2} Surely, you must've made a mistake in your calculations (;

Re: 6!

[gemini6ice.livejournal.com]

i remember when we encountered factorial in my pre-calc class back in HS, and one kid had never seen it before. When he read the problem aloud, he just shouted the part that was in factorial. ^o^

Re: 6!

[best-ken-ever.livejournal.com]

::actually laughed out loud at work:: Amazing (:

Re: 6!

[zandperl.livejournal.com]

Reminds me of one a math teacher told me. He taught them how

Lim(x->0) of (8/x) = ∞

And on an exam he gave

Lim(x->0) of (5/x) =

to which the student replied with a sideways 5.

Re: 6!

[jrtom.livejournal.com]

*snort*

I have to say that I would also have been tempted to answer that question that way.

On a slightly related note, I just today realized that one can interpret your icon as "no, you idiot, x is over here by the 0 symbolizing the number of points you're about to get". :) (Yes, I know that's not what the red 'x' symbolizes. But it tickles me that you can read it that way.)

Re: 6!

[zandperl.livejournal.com]

Every time I see it I think x₀ as in "initial x position."

Re: 6!

[jrtom.livejournal.com]

*nods* I can see that. Although it looks a bit more like X₀, i.e., perhaps the first in a series of state variables X or something, rather than a lower-case x. To me, anyway.

So many silly willful misinterpretations, so little paper on which to write them...

Re: 6!

[hitchhiker.livejournal.com]

LOL!!!!!

Re: 6!

[zandperl.livejournal.com]

Doesn't 0!=0 ?

Re: 6!

[best-ken-ever.livejournal.com]

0! is defined to equal 1 to satisfy a bunch of other math things. One way to think about it in the real world is, with 3!, you have 3!=6 ways to permutate 3 objects. You have 0!=1 way to permutate "no" objects. It's silly, but that's the way I've always thought about it. My way of permutating no objects is the same way that anyone else can do it. (:

Re: 6!

[zandperl.livejournal.com]

Oh, you're right. My bad, I forgot. :-P