Question

Find the exact circumference in terms of PI of a circle with the given radius. 7 feet

Answer 1

Find the formula for the circumference of a circle. C=?

Replace "r" (the radius) in that formula with 7 ft. End.

Answer 2

Yes I Agree With @mathmale

Answer 3

So C=2 PI? Then what do I do?

Answer 4

@mathmale is the one to help you he's very very smart so remember to ask him for help nextime

Answer 5

I'm new to this site how do I ask just him?

Answer 6

@mathmale

Answer 7

I'm new to this site how do I ask just him?

Answer 8

just what you just did just say, @mathmale and it will tell him you need his help.

Answer 9

Your formula is partially correct, but still needs work. Please go back, find the formula for the circumference of a circle, and share it here.

Answer 10

Ok thank you.

Answer 11

np thx @mathmale for you help too.

Answer 12

The formula for the circumference of a circle of radius "r" is .... ?

Answer 13

7?

Answer 14

Have you looked up this formula, James? Please Google "circumference of a circle" and copy down the relevant formula.

Answer 15

Alright

Answer 16

C = ??

Answer 17

C= 2pi r

Answer 18

@mathmale

Answer 19

@brooke..help00

Answer 20

Good. Now substitute "7 feet" for "r" in that formula. Share your result, please.

Answer 21

Do I divide or multiply 7 and 2? @mathmale

Answer 22

No. The formula is C=2 pi r. 2 pi r means "2 times pi times radius r."

Write out C = 2 pi r, and then write it again, substituting '7 feet' for r.
Show your work, please.

Answer 23

So C= 2 PI 7. Then if 2 times PI times radius 2 x 3.14?

Answer 24

This is exactly the same question that oyu asked yesterday with a different value for r

The answer method is the same

it asks for it in 'in terms of pi'
you need pi IN your answer

Answer 25

It include PI for me, I have to write it a weird way

Answer 26

no - you have put in a number for pi (3.14) - you must leave "pi" in your answer

Answer 27

but you must learn from asking these questions

refer to yesterdays answer and do the same thing

Answer 28

3.14 is NOT exact - it is an approximation
"pi" means 'the exact value of pi'

Answer 29

It's because it says exact answer and I don't know what exact answer means

Answer 30

In this case, C = 2 pi r.
Better written in mathematical terms, this would be \[C = 2 \pi r\]

Answer 31

the answer to yesterdays question was
exactly 10 pi

now do the same but let r=7

Answer 32

The problem instructions say to express your answer in terms of 'pi,' which means in terms of the symbol \[\pi\]

Answer 33

So, write out \[C=2 \pi r\]

Answer 34

and then replace that "r" with "7 feet." DONE.

Answer 35

So my answer would be 12

Answer 36

"the answer to yesterdays question was
exactly 10 pi" TRUE. Just replace that "pi" with the symbol \[" \pi "\]

Answer 37

I don't have to write it out in an equation it gives me that I just need a number

Answer 38

I disagree. You are to write out the answer in terms of the mathematical character \[\pi\]

Answer 39

Is there a way I can take a picture and put it on here?

Answer 40

The sooner you understand this "in terms of" stuff, the better.

simplify the following: \[C= 2 \pi (14~feet)\]

Answer 41

C=2 pi (7 feet)

Answer 42

and you will be done.

Take a screen shot and share the resulting image.
Or take a photo of the screen with your cell phone, upload the image to your computer, and then upload the image to OpenStudy.

Please stop arguing. Learn what "in terms of" means, and also learn what "in terms of pi" means. It does NOT, repeat, NOT, state that you are supposed to "write a number" for pi.

Answer 43

How do I post screenshots on here

Answer 44

the only way you can write pi exactly is π

you answer must include that symbol π (or "pi" will suffice in this board)
(the alt codes don't seem to work here ALT227 should produce π)

Answer 45

We don't need a screenshot - we understand the question

You need to understand what the answer looks like

yesterdays correct answer was 2π*5 = 10π

"10π" is the correct exact answer

now do exactly that but use 7 instead of 5 for the radius

Answer 46

The circumference of a circle of radius 7 feet is ... (you fill in the answer).

Answer 47

So 12

Answer 48

No 14

Answer 49

yesterdays correct answer was 2π*5 = 10π

"10π" is the correct exact answer

now do exactly that but use 7 instead of 5 for the radius

Note there is a π in the answer

there MUST be a π in YOUR answer

π IS a number

Answer 50

2π*5 = 10π

change the 5 to a 7 and rewrite the answer

Answer 51

I get there needs to be the symbol in there I have that I just don't know what the answer is like do I do 7 times 14

Answer 52

7 times 2 my bad

Answer 53

yes

Answer 54

I repeat my last post
do EXACTLY this and you will have your answer....>

2π*5 = 10π
change the 5 to a 7 and rewrite the answer

Answer 55

Okay so my next question is the same just with a radius of 3 1/2 so I would just do 3 1/2 times 2 get that number then put my symbol?

Answer 56

Please take a chance: Review our past discussion and then DO the work.

Answer 57

So much depends upon your learning something well enough to be able to apply it to a new situation. That's what you have to do here.

Answer 58

Please post your answer to the question we are helping with

C=2πr
is the same as
C=2rπ

so the answer is yes it is always 2 times radius times π

Answer 59

So then I will take 14 and do 14x 3.14?

Answer 60

Or just leave it as 14

Answer 61

Kindly DO the work and SHARE it here. Why are you using 3.14 again? STICK with "pi" or \[\pi\]

Answer 62

Thre is NO reason to use 3.14 as an approx. value for pi, not here, anyway.

Answer 63

Ight bruh. So my answer is 14 with re symbol correct?

Answer 64

The*

Answer 65

do you understand that π represents an actual number that CANNOT be written any other way exactly?

the reason for NOT using 3.14 is because pi is not EQUAL to 3.14

Answer 66

What was the radius? What are the correct units of measurement?

Please type out the entire formula:
C = 2 pi r

and then make the appropriate substitution for the r value (not the pi value)./

Answer 67

Yea I get that part man

Answer 68

C=2 PI 7

Answer 69

That's better! But what does the '7' represent? MUST show a unit of measurement.

Answer 70

Radius

Answer 71

C= 2 pi ( ? )
You MUST provide a numerical value (with units of measurement included) for the radius.

Answer 72

7 PI ft.

Answer 73

What happened to the label, "C?" What happened to the multiplier, "2?"

Answer 74

C = 2 pi (7 feet)

Simplify this, please.

Answer 75

(Multiply '7 feet' by 2.)

Answer 76

So 14