Question

HELP ASAP i dont know how to do any of this

Answer 1

Explanation:

Circumference is= to diameter * Pi

`6\pi = 6*3.14=18.84\\15\pi=15*3.14=47.1`

For the ones that are radius, double it, then pi

`21*2\pi = 42\pi =42*3.14=131.88\\6.7*2\pi=13.4\pi =13.4*3.14=47.076`