A large sphere of material is placed in a dissolving liquid. (a) When the radius is 1 m, it is observed to be changing at 7 cm/hour. At that instant, what is the rate at which the sphere's volume is being dissolved with respect to time? 28At cm3/hr XConsider the curve ex - y = yox + 4. Using logarithmic differentiation find . Give the answer as a function of both x dx and y. dy 2y(x - Iny) dx 2x+ y+ 3