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Mathematics 19 Online
OpenStudy (tylermckinney16):

Help please.

OpenStudy (tylermckinney16):

Questions here.

OpenStudy (tylermckinney16):

@Isaiah.Feynman

OpenStudy (tomy12345):

to find the circumference whats the formula?

OpenStudy (isaiah.feynman):

I feel like you can beat this one yourself.

OpenStudy (tylermckinney16):

So its like the one before?

OpenStudy (tomy12345):

C = r^2 * 3.14

OpenStudy (tomy12345):

should I not help?

OpenStudy (tylermckinney16):

root of 36 is 6

OpenStudy (isaiah.feynman):

Anyone is welcome to help.

OpenStudy (tylermckinney16):

Is the answer 12? i did root of 36 is 6 and 6*2=12??

OpenStudy (tomy12345):

so if you times pi by radius^2, you divide circumference by pi to get diameter and that diameter in half equals radius... hope I helped^_^

OpenStudy (tylermckinney16):

11.4649681529 ?????

OpenStudy (isaiah.feynman):

Well, lemme try. We have circumference and radius here. The circumference and radius are related by \[C = 2 \pi r\] We can solve for the radius to get \[r = \frac{ C }{ 2 \pi }\]

OpenStudy (tylermckinney16):

Ok

OpenStudy (isaiah.feynman):

What is C?

OpenStudy (tylermckinney16):

2?

OpenStudy (isaiah.feynman):

Nope. C stands for circumference, it is in the question. Try again.

OpenStudy (tylermckinney16):

oh 36

OpenStudy (isaiah.feynman):

36 pi.

OpenStudy (tylermckinney16):

Ok cool.

OpenStudy (isaiah.feynman):

Can you plug in and solve now?

OpenStudy (tylermckinney16):

What do i plug it in to?

OpenStudy (tylermckinney16):

18?

OpenStudy (isaiah.feynman):

Yes. That's the answer.

OpenStudy (tylermckinney16):

Cool :)

OpenStudy (isaiah.feynman):

How did you get it??

OpenStudy (tylermckinney16):

I did 36/2=18

OpenStudy (isaiah.feynman):

Well good, what about the pi ?

OpenStudy (tylermckinney16):

So i put 18 pi?

OpenStudy (isaiah.feynman):

No. I want to see how you knew the pi shouldn't be there.

OpenStudy (tylermckinney16):

I remembered what we did in the other question we did.

OpenStudy (isaiah.feynman):

Okay, good!

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