[conspire] (forw) Re: Correction

[Texx]

The pond scum question has other implications.

Most people get the answer wrong, Im sure.

Putting on sysadmin hat, the question should be asked WHY do they get this
problem wrong?
Ive had a few days to ponder this.  Free time on your hands is definitely
dangerous.
Its the one thing the Puritans were correct about.

For those without a substantial math background, working the problem
forwards is easy to
get tripped up on.
For those of us with only a mediocre math background BUT those of us who
think in reverse,
its not so bad.

If its doubling every day then going back a day its halving.
That known, its quite easy to find 50% 25% 12.5% .625% etc.

Ricks line about "peeling back the onion" is quite apropos here.
Sadly, Im seeing that math is just taught wrong in much of the US.

Everyone NEEDS a LOG!



On Fri, Mar 27, 2020 at 12:45 AM Rick Moen <rick at linuxmafia.com> wrote:

> I thank Paul for his courtesy.  I'll let him have the last word.
>
> ----- Forwarded message from "paulz at ieee.org" <paulz at ieee.org> -----
>
> Date: Fri, 27 Mar 2020 02:28:19 +0000 (UTC)
> From: "paulz at ieee.org" <paulz at ieee.org>
> To: Rick Moen <rick at linuxmafia.com>
> Subject: Re: [conspire] Correction
> Reply-To: "paulz at ieee.org" <paulz at ieee.org>
>
>  I got to thinking about exponential and geometric and what was the
> difference between the two.  From Wikipedia article on Exponential Growth
>
> In the case of a discrete domain of definition with equal intervals, it is
> also called geometric growth or geometric decay since the function values
> form a geometric progression.
>
>
>
> "The area covered by pond scum doubles every day."  To get the daily
> values, the geometric form works fine.  However, if one wants to compute
> for different times of the day, the exponential form of calculation with a
> non-integer exponent will be needed.
>
> I sent this just to you. If you like, we can the issue stop here.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>     On Thursday, March 26, 2020, 12:23:02 PM PDT, Rick Moen <
> rick at linuxmafia.com> wrote:
>
>  Quoting tom r lopes (tomrlopes at gmail.com):
>
> > Both examples are geometric sequence.
>
> Tom, I'm not going to belabour the point.  The two expressions are
> fundamentally different -- of a different order.  They are not both
> geometric.  But I'm going to not pursue the matter past this point
> because there's no percentage (sorry!) in it.
>
> --
> Cheers,                                "Rand Paul being patient zero for a
> Senate
> Rick Moen                              viral outbreak is a sign of a
> writers' room
> rick at linuxmafia.com                    dropping too much acid, late in
> the season."
> McQ! (4x80)                                          -- @owillis (Oliver
> Willis)
>
> _______________________________________________
> conspire mailing list
> conspire at linuxmafia.com
> http://linuxmafia.com/mailman/listinfo/conspire
>
>
> ----- End forwarded message -----
>
> _______________________________________________
> conspire mailing list
> conspire at linuxmafia.com
> http://linuxmafia.com/mailman/listinfo/conspire
>


-- 

R "Texx" Woodworth
Sysadmin, E-Postmaster, IT Molewhacker
"Face down, 9 edge 1st, roadkill on the information superdata highway..."
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://linuxmafia.com/pipermail/conspire/attachments/20200327/93d9e2d2/attachment.html>