The radius, diameter, or circumference of a circle is given. Find the missing measures. Round to the nearest hundredth if necessary.

d = 22.7 mm., r = ? , C = ?
a.
r = 11.35 mm, C = 35.66 mm
c.
r = 45.4 mm, C = 71.31 mm
b.
r = 45.4 mm, C = 35.66 mm
d.
r = 11.35 mm, C = 71.31 mm