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Mathematics 58 Online
OpenStudy (anonymous):

Use the formula to answer the question. V = 2prh Which is equal to h? (Points : 1) Option A: 2pr V Option B: V 2pr Option C: 2(pi)r/V Option D: V/2(pi)r

OpenStudy (opcode):

Are you sure you typed the whole question?

OpenStudy (anonymous):

For one and two there's a space between and that represents a negative sign.

OpenStudy (anonymous):

Yes I did.

OpenStudy (opcode):

Ah. Okay that makes more sense.

OpenStudy (opcode):

So we have: \[V = 2prh\] We want to rewrite the equation to equal \(h\) instead of \(V\). Any ideas on how to do that?

OpenStudy (anonymous):

Ahh no clue lol

OpenStudy (opcode):

Okay, well first try moving \(h\) over to the side \(V\) is on. Can you do that?

OpenStudy (anonymous):

While he's working on that. Could someone work on this as well. Use the formula to answer the question. l = Prt

OpenStudy (anonymous):

Could you give me the answer real quick.

OpenStudy (anonymous):

Sorry.

OpenStudy (anonymous):

Oh nvm. I'm good, proceed.

OpenStudy (opcode):

Okay. \[V = 2prh\] Move \(V\) over the equal sign giving: \[0 = 2prh - V\] Now we want to make the equation equal to \(h\). Can you understand how I did the above though?

OpenStudy (anonymous):

Yes.

OpenStudy (opcode):

Can you figure out how to move \(h\) to get the equation to be equal to \(h\)?

OpenStudy (anonymous):

Get h equal to h?

OpenStudy (anonymous):

Or h equal to v?

OpenStudy (opcode):

No set the equation to be equal to \(h\). As in: \[h = xxxxxxx\]

OpenStudy (anonymous):

I'm guessing we could eliminate B?

OpenStudy (opcode):

Ah, wait. I've just became really confused. Option A is: \(2pr - V\) Option B is: \(V - 2pr\) Correct? My understanding was that: \[0 = 2prh - V\] We move \(h\): \[-h = 2pr - V\] But this doesn't actually work... I must be messing up something simple.

OpenStudy (anonymous):

Lol, sory about that, yes that's the correct answer options.

OpenStudy (opcode):

Well Option C and D are certainly out because the original equation has no \(\pi\).

OpenStudy (anonymous):

I'm going with option A.

OpenStudy (opcode):

Actually wait.

OpenStudy (opcode):

\[-h = 2pr - V \implies h = V-2 p r\]

OpenStudy (anonymous):

B?

OpenStudy (opcode):

So it's option B. I was just having a brain glitch, eh sorry. :-P

OpenStudy (opcode):

Yes. :-)

OpenStudy (anonymous):

That's okay. As long I get this done.

OpenStudy (anonymous):

Alright just one more question, then I'm done.

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