# Expressions

• Jul 2nd 2007, 11:31 AM
Expressions
I am very unsure about how to tackle this problem.
• Jul 2nd 2007, 11:36 AM
janvdl
The 2nd and 6th boxes are right i think.

Becos they have $\displaystyle something^3$
• Jul 2nd 2007, 01:16 PM
CaptainBlack
Quote:

Originally Posted by janvdl
The 2nd and 6th boxes are right i think.

Becos they have $\displaystyle something^3$

and the seventh.

RonL
• Jul 2nd 2007, 01:18 PM
janvdl
Why Captain? Because it's a side multiplied by a side squared?

Hmm, didn't see that one.
• Jul 2nd 2007, 01:25 PM
Jhevon
Quote:

Originally Posted by janvdl
Why Captain? Because it's a side multiplied by a side squared?

Hmm, didn't see that one.

yeah, it kind of looks like the volume of a cylinder to me (with height = 3b and radius = c), but maybe Captain was thinking of something else
• Jul 2nd 2007, 07:38 PM
CaptainBlack
Quote:

Originally Posted by Jhevon
yeah, it kind of looks like the volume of a cylinder to me (with height = 3b and radius = c), but maybe Captain was thinking of something else

May be I'm thinking of dimensional analysis. Case 7 is [L][L]^2 = [L]^3 which
is all that is needed for it to be a possible volume.

RonL
• Jul 3rd 2007, 02:44 AM
topsquark
Of course, any of them can have "hidden" units, where the constant (such as the $\displaystyle \pi$) carries a unit with it...

-Dan