Question

Can someone please help me figure out how to solve this

Answer 1

2 should be the answer!

Answer 2

Answer:

2

Step-by-step explanation:

$C_{old}=2 \pi r = 2 \times \pi \times 3 = 6 \pi.$

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

$C_{new}=2\pi r= 2 \times \pi \times 6 = 12\pi$.

So the circumference is multiplied by

$\frac{C_{new}}{C_{old}}=\frac{12\pi}{6\pi}=2$

when the radius is doubled.