Question

if the radius of a clock is 5 inches, what's the distance around the edge of the clock between the 2 and 5 to the nearest hundredth of an inch?

Answer 1

I don't know if there is another way to do this.

You have radius. So find out the circumference. C = 2(pi)(r)
Then divide the C into twelve parts.-> ask if you don't know why.
Multiply the answer you get with 3. This will be the final answer.

Answer 2

what is the radius?

Answer 3

It's given. "Radius of the clock is 5inches"

Answer 4

haha wow that was dumb i missed that, sorry. i'll work the problem and can u check it for me ?

Answer 5

ya sure

Answer 6

what should i use for pi

Answer 7

3.14

Answer 8

ok i thought so, cause sometimes its 180 and i don't really understand why

Answer 9

pi in geometry is 180DEGREES and otherwise pi is 22/7=3.14

Answer 10

right. ok so i'm not doing pi in degrees. hanks

Answer 11

i got 7.86, is this correct?

Answer 12

7.86 inches i should say

Answer 13

Yup!

Answer 14

thanks so much :) i understand it much better now!!

Answer 15

Hey I got 7.85 inches..just take a look. Since the answer should be rounded to the nearest hundredth of an inch, you must be nearly accurate. Just take a look.

Answer 16

welcome : )

Answer 17

okay i'll retry it

Answer 18

i did c = 2(π)(5)

Answer 19

and from there i got c = 31.42

Answer 20

and 31.42/12=2.62

Answer 21

2.62*3=7.86

Answer 22

how did you do it?

Answer 23

I took pi=3.14 and you took 3.142..That's the difference

Answer 24

oh i just used the pi button on my calculator

Answer 25

so i think it used the exact pi

Answer 26

Ya it's 7.86
Don't worry. I rounded pi=22/7=3.14285 to nearest hundredth(since the question deals with the nearest hundredth) which is 3.143
And the answer to this question becomes 7.8575->7.86 when rounded to the nearest hundredth

Answer 27

oh ok i see, well thank you so much i really appreciate it!! and just to be clear you divided the circumference by 12 to get the length of 1 unit right? and then multiplied it by 3 to get the distance around the edge between 2 and 5 correct?

Answer 28

Did I do something wrong?/ Sorry if I confused you..! Put 7.86 or 7.85 depending on the pi value you use generally in your class

Answer 29

yes! that's the thing I did!

Answer 30

yeah either one should be fine it's just a practice activity anyways :)

Answer 31

ok thanks again! just double checking

Answer 32

Okay anyways great work!

Answer 33

thanks!!