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I'm surprised to hear that a student would rather use a formula that involves a
fraction than one that doesn't. The only thing I can think of for the surface
area of a cylinder would involve a fraction approximating Pi.
-Marty
----- Original Message -----
From: Kristena Hernandez
To:
Sent: Friday, November 26, 2004 1:56 AM
Subject: Re: [SurfGuitar101] 15" Speakers versus 12" versus 10" - some
thoughts...
Marty--
> The formulas you are looking for concerning the surface area of a
> dome can be found at
> .
Thanks for that link. It will be useful for tutoring.
>
> The student may have used (2)(Pi)(r)(r+h). If you expand that
> formula, it is the same as yours.
No, it was some formula that contained a fraction. Like I said, I had
never seen it before. When the student showed the formula to me, I
thought it was wrong, but I tried it out on a couple of problems and it
worked! I'll ask around my school. I just forget about it until
something like this comes up. (and hopefully it was for the S.A. of a
cylinder! I'm pretty sure it was)
.
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