Answer:
Circumference
The circumference of a circle can be found using:
c=2πr
We know the radius is 18, so we can substitute 18 in for r
c=2π18
Multiply
c=36π
c=113.097335529
To the nearest hundreth:
c=113.10 inches
Area
The area of a circle can be found using:
a=πr^2
We know the radius is 18, so we can substitute 18 in for r
a=π18^2
a=π324
a=1017.87601976
To the nearest hundreth
a=1017.88 inches^2
