Answer:
Step-by-step explanation:
The formula of a circumference of a circle:
[tex]C=2\pi r[/tex]
r - radius
We have C = 21.99 ft. Substitute and solve for r:
[tex]21.99=2\pi r[/tex] divide both sides by 2π
[tex]r=\dfrac{21.99}{2\pi}[/tex]
Use [tex]\pi\approx3.14[/tex]
[tex]r\approx\dfrac{21.99}{2(3.14)}=\dfrac{21.99}{6.28}\approx3.5[/tex]
The radius of a circle with a circumference of 21.99 feet is 3.50 ft
where
r = radius
Therefore,
circumference = 21.99 ft
circumference = 2πr
circumference = 2 × 3.14 × r
21.99 = 6.28r
divide both sides by 6.28
r = 21.99 / 6.28
r = 3.50159235669
r = 3.50 ft
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