Answer:
4.15
Step-by-step explanation:
the radius is half the diameter so 8.3/2
=4.15mm
radius is the half of the diameter so 8.3/2 is 4.15
0.42
nxxjdndndndkdkd
snns
dndn ecochin
divination funk bunk
byhhbjdnd
nsnndbddnnjdjjjjkk
djsjdndnsndn
5c+1+3c=61
8c+1=61
8c=62
c=7.75