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Mathematics 10 Online
zarkam21 (zarkam21):

Why isn't anybody helping me ? :(

OpenStudy (kgrendel0324):

Whats your question?

zarkam21 (zarkam21):

OpenStudy (kgrendel0324):

Okay you know how to find the SA

zarkam21 (zarkam21):

No

OpenStudy (kgrendel0324):

okay, volume of a sphere = 4 * pi * r^3 / 3

OpenStudy (kgrendel0324):

Put this equal to 3000 cm^3 then solve for r/ radius

OpenStudy (kgrendel0324):

\[3000cm ^{3} = \frac{ 4*\pi*r ^{3} }{ 3 }\]

zarkam21 (zarkam21):

Okay and then

OpenStudy (kgrendel0324):

You should get a radius equal to 8.95cm

zarkam21 (zarkam21):

So for part 1 , the answer is 8.95cm

OpenStudy (kgrendel0324):

Yeah, or 8.947 if they want to be exact

zarkam21 (zarkam21):

Nope to the nearest hundredth

zarkam21 (zarkam21):

Thank you sooo sooo sooo much, I really mean it :)))

zarkam21 (zarkam21):

and then for part 2?

OpenStudy (kgrendel0324):

i didn't see part 2

zarkam21 (zarkam21):

OpenStudy (kgrendel0324):

ok

zarkam21 (zarkam21):

I did the math and got 112.412

OpenStudy (kgrendel0324):

\[SA=4*\pi*8.947^2\]

zarkam21 (zarkam21):

ohhh if i do it that way I get 1005.923001

OpenStudy (kgrendel0324):

GOOD JOB

zarkam21 (zarkam21):

Would it be units squared

zarkam21 (zarkam21):

or cubed

OpenStudy (kgrendel0324):

yup 1005.9cm^2

OpenStudy (kgrendel0324):

\[1005.9cm^2\]

OpenStudy (kgrendel0324):

Squared

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