Answer:
The best estimate of the circumference of a circle is 21 ft.
Step-by-step explanation:
Formula
[tex]Circumference\ of\ a\ circle = 2\pi r[/tex]
Where r is the radius of a circle.
As given
Diameter of 7 feet .
[tex]Radius = \frac{7}{2}[/tex]
Radius = 3.5 feet
As
[tex]\pi = 3.14[/tex]
Put in the formula
[tex]Circumference\ of\ a\ circle = 2\times 3.14\times 3.5[/tex]
Circumference of a circle = 21.98 ft .
Therefore the best estimate of the circumference of a circle is 21 ft.
