if the radios is 3.7 what is the circumference

Without units, it's impossible to determine the circumference. However, assuming the units are in centimeters, the formula for the circumference of a circle is C = 2πr, where r is the radius. If the radius is 3.7 cm, then the circumference would be:

C = 2π(3.7) cm
C = 23.247 cm (rounded to three decimal places)