The circumference of the circle shows that the number of stones needed will be 13.
How to calculate the circumference of the circle?
To calculate the value of the circumference of the circle, we use the formula C = 2πr, where r is the radius of the circle, and π is a constant l.It should be noted that the circumference of a circle is calculated by using the formula:
[tex]= 2\pi r\\= 2 * 3.142 * (4/2)\\= 12.568\\= 13[/tex]
See more about circle at brainly.com/question/22965557
