## Hollis Group Title What would the volume of a cube that is 0.5cm be? 2 years ago 2 years ago

1. satellite73

not to sound like a wise guy, but "cube" it

2. satellite73

which is why we read \((.5)^3\) as "point five cubed" instead of "to the third power"

3. goformit100

|dw:1350960486596:dw|

4. tkhunny

It makes no sense as presented. Please probide the EXACT problem statement and maybe throw in your efforts at a solution.

5. Hollis

im doing a lab and i have the surface area but i dont know how to find the volume of it

6. satellite73

i was assuming the problem was "find the volume of a cube if the length of each edge is \(.5\)

7. tkhunny

Well, in your lab, they probably told you to use useful notation. I agree with this instruction. A cube cannot be "0.5 cm". The area of a side of a cube cannot be "0.5 cm". The length of an edge can be "0.5 cm". It would help everyone, especially you, if you would write more clearly exactly what it is you mean to convey. Sloppy language and sloppy notation kill people if you are building nuclear reactors. May as well start now learning how to be more careful and exact.

8. satellite73

wow

9. satellite73

ikr? just compute \((.5)^3\)

10. tkhunny

You're still doing it. It's volume. It cannot be "cm". You must think about what you are writing. You can't just guess. That doesn't work. You still have yet to confirm that satellite73's very resonable assumption about what you meant is, indeed, correct. Is the edge measurement 0.50 cm or isn't it? What did you get for the Surface Area?

11. Hollis

my surface area is 1.25

12. Hollis

and the edge measurement is 0.5

13. tkhunny

Awesome. No it's not. 1.25 is a number. You need some units. Is it 1.25 cm^2? That would be a proper designation if your arithmetic were correct. The edge measurement is not 0.5. That is a number. You need some units. 0.5 cm? That would be a proper designation. Edge: E = 0.5 cm Surface Area: 6*(0.5 cm)^2 = 1.50 cm^2 Volume: (0.5 cm)^3 = 0.125 cm^2 (this may need to be 0.13 cm^2, depending on your significant figure instructions.) No fooling - please learn to use proper units. Units are your friends. They will save youfrom many, many errors. It is NOT a small thing.