Consider a circle whose size can vary. let r represent the radius of the circle (in cm) and let c represent the circumference of the circle (in cm). suppose the function g determines the radius of the circle in cm, r , given its circumference in cm, c . write a function formula for g . g ( c ) = what does g ( 15 ) represent in this context? select all that apply. the circumference (in cm) of a circle whose radius is 15 cm. the radius (in cm) of a circle whose circumference is 15 cm. a circle with a circumference of 15 cm. a circle with a radius of 15 cm. if g ( a ) = 15 , what does a represent in this context? select all that apply. the circumference (in cm) of a circle whose radius is 15 cm. a circle with a circumference of 15 cm. a circle with a radius of 15 cm. the radius (in cm) of a circle whose circumference is 15 cm.