Question

(Circumference of circles)
please explain so I can understand

Answer 1

45

Explanation:

what i did was 4.5 x 10 and i got 45

Answer 2

Explanation:

`C=2\pi r,\ r=4.5,\ L=C+10\\ \\ L=2(4.5)\pi +10\\ \\ L=9\pi +10\\ \\ L\approx 38.27in`