Answer:
none of your answers are correct! If you solve in terms of π then is 14/π
Explanation:
radius r = 4.45633841 in
diameter d = 8.91267681 in
circumference C = 28 in
area A = 62.3887377 in^2
In Terms of Pi π
circumference C = 8.91267681 π in
area A = 19.858952 π in^2
The formula is simple radius r=C/2π