Question

Find the exact circumference of a circle with an area equal to 36pi sq. in.

a) 12pi
b) 18pi
c) 324pi

Answer 1

@satellite73

Answer 2

what is the formula for area and circumference?

Answer 3

circumference of a circle is \(C=2\pi r\) where \(r\) is the radius

Answer 4

yeah that's what I was gonna' say

Answer 5

area is \(\pi r^2=36\pi\) so \(r=?\)

Answer 6

18

Answer 7

wrong

Answer 8

It is?

Answer 9

not half dear, the square root of 36

Answer 10

Oh!

Answer 11

I'm sorry

Answer 12

It's 6 then

Answer 13

not \(36\div 2\) but rather \(\sqrt{36}\)

Answer 14

area is \(\sf\pi r^2=36\pi \to r^2 = 26\)

Answer 15

right, and if \(r=6\) then your final job is to compute
\[2\times 6\times \pi\]

Answer 16

and now plug in \(\sf r=6\) into the circumference formula (:

Answer 17

37?

Answer 18

For 2*6*3014=37

Answer 19

lol no

Answer 20

You don't simplify the \(\sf\pi\) since it wants the exact circumference

Answer 21

just
\[2\times 6\pi\]what is \(2\times 6\)?

Answer 22

12

Answer 23

and the answer choices also contain \(\sf \pi\)

Answer 24

yes

Answer 25

right, \(12\pi\)

Answer 26

Omg it's 12pi

Answer 27

omg indeed!

Answer 28

\(\ddot\smile\)

Answer 29

I'm sorry after spending a week traveling up and down from Mississippi to Florida, My head hasn't been on straight

Answer 30

that is what you get for going to mississippi

Answer 31

Yeah, but I was helping my aunt on bisiness and plus I made some money

Answer 32

ok ok no offence

Answer 33

*business* Lol

Answer 34

$$ always good

Answer 35

Yep

Answer 36

bidniz as we say

Answer 37

btw sent you lee morgan youtube again
take a listen some time

Answer 38

x'D

Answer 39

I haven't made any in awhile and plus it's always better thaqn spending a week alone with my gma and uncle bickering a complaining the entire time

Answer 40

Don't worry I will. It's just that I'm at school right now and their wifi blocks youtube

Answer 41

real school not on line? in the summer?
sounds like a drag

Answer 42

Yeah. I have Odyssey

Answer 43

I go home at 11pm

Answer 44

OMG indeed !

Answer 45

Yes

Answer 46

But that's what I get after failing the last half of geometry. although most of it wasn't my fault after the difficult home, living, and family issues I was having....

Answer 47

It's hard when you've been to three different highschools during your freshmen year

Answer 48

you'll get through geometry

Answer 49

i bet

Answer 50

Thanks. I sure hope so. I'll still be taking Algebra 2 nxt year. I just have to complete Geometry online during the summer though

Answer 51

lets get busy !

Answer 52

got another ?

Answer 53

Yep. I sure do

Answer 54

Hey, which one of you should I medal?

Answer 55

You both were alot of help

Answer 56

smart one i got plenty

Answer 57

kk

Answer 58

I will

Answer 59

Thanks for making the decision easy

Answer 60

I have plenty as will, give it to satellite so he can keep his 100 SS (:

Answer 61

Oh mouse dung!

Answer 62

tOO LATE TO GO BACK NOW

Answer 63

Woops caps locked again

Answer 64

I hate when that happens

Answer 65

fret not
i can't turn them in to cash or valuable prizes anyways

Answer 66

Oh cool

Answer 67

Well lets get on to the next question then

Answer 68

good idea