Answer:
6 cm
Step-by-step explanation:
A = 4πr^2
4πr^2 = 36π cm^2
r^2 = 9 cm^2
r = 3 cm
d = 2r = 6 cm
Step-by-step explanation: 90
the first on is -42
the second one is -80
the last on is -88
