## anonymous one year ago What is the circumference of a circle with a radius of 0.8 m? A. m B. m C. m D. m

1. anonymous

i will give you a medal

2. anonymous

if you help me

3. anonymous

looks like m is the only choice....

4. anonymous

what is the formula for the circumference of a circle?

5. anonymous

a.0.64 tt m b.0.8 tt m c.1.6 tt m d 2.56 tt m

6. anonymous

what i think is 1.6 tt m

7. anonymous

why do you think that?

8. anonymous

becuse i multiply 0.8*2

9. anonymous

that is not the way to find the circumference. you can use: $C=2\pi r$ and see what you get...

10. anonymous

so its c

11. anonymous

are you there

12. anonymous

i get 5 ..., are you sure those are the options?

13. anonymous

yes

14. anonymous

why does they say tt m ?

15. anonymous

thats how they look

16. anonymous

okay, i know what is happening, that "tt" looks pretty much like the letter pi: $\pi$ so the answers are given as a number times pi so the answer is: $1.6\pi$

17. anonymous

thank you

18. anonymous

yw!!