What is the circumference of a circular hot tub if its radius is 1.55 m?

The circumference of a circle can be calculated using the formula ( C = 2\pi r ), where ( r ) is the radius. For a hot tub with a radius of 1.55 m, the circumference would be ( C = 2 \times \pi \times 1.55 \approx 9.73 ) meters. Therefore, the circumference of the circular hot tub is approximately 9.73 meters.