## anonymous 4 years ago If the radius of a circle is multiplied by 4, then how many times larger is the circumference of the new circle?

1. anonymous

The circumference of a circle is given by $2*\pi*r$

2. anonymous

and lets say we pick r=1 we get $2*\pi$

3. anonymous

now lets say that we multiply the radius by 4 so now r=4

4. anonymous

$8*\pi$

5. anonymous

8 pi is 4 times bigger than 2 pi

6. anonymous

7. anonymous

Look at my last post

8. anonymous

so what do i do next

9. anonymous

so is 32

10. anonymous

wait can you tell me what the original radius equals?

11. anonymous

i really dont know

12. anonymous