A stone is dropped in a lake, creating a circular ripple that travels outward at a speed of 65 cm/s. (a) Find a function g that models the radius as a function of time t, in seconds. g(t) = (b) Find a function f that models the area of the circle as a function of the radius r, in cm. f(r) = (c) Find f. g. f.g= What does this function represent? This function represents the area of the ripple as a function of the radius. This function represents time as a function of the area of the ripple. This function represents the radius of the ripple as a function of time. This function represents the area of the ripple as a function of time. This function represents the radius of the ripple as a function of area.