Question

Can someone please help me figure out how to solve this

Answer 1

2 should be the answer!

Answer 2

2

Explanation:

`C_(old)=2 \pi r = 2 * \pi * 3 = 6 \pi.`

Now double the radius so that
`r=6` then

`C_(new)=2\pi r= 2 * \pi * 6 = 12\pi`.

So the circumference is multiplied by

`(C_(new))/(C_(old))=(12\pi)/(6\pi)=2`

when the radius is doubled.