Can someone check and tell if my answer is
asap
and if not can you just right an correct answer..

1)

You have to find the diameter, which is 2r

You can do it two ways

a) Find the radius first

r =  = √28,26/3,14 = √9 = 3 cm

d = 3*2 = 6 cm

b) Use the formula d =  = √4*26,28/3,14 = √113,04/3,14 = √36 = 6 cm

2)

Use the formula r =

So r = √12,56/3,14 = √4 = 2 cm