Respuesta :
The answer would be 200 because you have to divide 1256 by 3.14 to get the diameter then divide by 2 to get the radius.
Radius = 19.99
r = radical A/pi = radical/ 1256/pi
r = 19.99493
Radical is square root
r = radical A/pi = radical/ 1256/pi
r = 19.99493
Radical is square root