sorry I don't know this stuff btw I do edmentem too
Tandygirl:
im in middle school
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Tandygirl:
so ik half dis stuff
cseltzer:
same
cseltzer:
6th grade
cseltzer:
:(
Tandygirl:
ik half dis stuff i helped alot of people today
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Florisalreadytaken:
lets do it 1 by 1
1) a cone with a radi of 12 units and a height of 6 units.
\[ V=\pi r^{2} \frac{h}{3} \]
where
\[ r=12 \]
\[ h=6 \]
that said, we get this:
\[ V=\pi \times 12^{2} \times\frac{6}{3} \]
\[\Large V=??\]
aidenj:
904.8
aidenj:
pls tell me im right
Florisalreadytaken:
yes but no -- leave it as it is in \( \pi \) form
aidenj:
3.14
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Florisalreadytaken:
lets do it this way
what is \( 12^{2} \times\frac{6}{3} \) ?
aidenj:
288
Florisalreadytaken:
yes -- that times \( \pi \)
so we get \( 288 \pi \) which is the 1st column
Florisalreadytaken:
2) a cylinder with a diameter of 12 units and a h of 27 units.
\[ V=\pi r^{2} h \]
where
\[ r= \frac{1}{2} of diameter \Rightarrow 6 \]
\[ h=27 \]
thus:
\[ V=\pi \times 6^{2} \times 27 \]
\[\Large V=??\]
aidenj:
927
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aidenj:
i meant 972
Florisalreadytaken:
dont forget the \( \pi\)
so yes that one belongs to the 2nd column
3) a sphere with a diameter of 12 units
\[ V=\frac{4}{3} \pi r^3 \]
where
\[ r= \frac{1}{2} \text{ of diameter} \Rightarrow 6 \]
thus,
\[ V=\frac{4}{3} \pi \times 6^3 \]
\[\Large V=??\]
aidenj:
288
Florisalreadytaken:
\( 288 \pi \) correct, so first column
4) a cylinder with a diameter of 8 units and a height of 18 units
\[ V=\pi r^2 \ h \]
where
\[ r= \frac{1}{2} \text{ of diameter} \Rightarrow 4 \]
\[ h=18 \]
thus,
\[ V=\pi \times 4^2 \times 18 \]
\[\Large V=??\]
aidenj:
288
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aidenj:
and isnt the next one 972
Florisalreadytaken:
@aidenj wrote:
288
correct -- so 1st column
5) a sphere with a diameter of 12 unradius of 9 units.
\[ V=\frac{4}{3} \pi r^3 \]
where
\[ r=9 \]
thus,
\[ V=\frac{4}{3} \pi \times 9^3 \]
\[\Large V=972 \pi\]
correct! so 2nd column
aidenj:
thank u so much
Florisalreadytaken:
cone is left -- u do it
Florisalreadytaken:
the last one
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aidenj:
i did
aidenj:
sry lag
aidenj:
288
Florisalreadytaken:
what? no -- try again
aidenj:
which cone
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Florisalreadytaken:
im talking about the "a cone with a diameter of 18 units and a height of 36 units"