2*pi*5 (or 2*3.14*5)
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The radius is 4 meters.
Its circumference = 2*pi*4 meters
The circumference of a circle can be found with this formula: Circumference = 2*(radius)*∏ where ∏ can be rounded to 3.14 Plugging in your radius of 4: Circumference = 2*4*∏ = 8*∏ which is around 25.13.
To the nearest hundredth, the circumference of a circle with a radius of 4 is 25.13
A circle with a radius of 4 miles has a circumference of 25.13 miles.