Suppose a spherical balloon is being filled with air so that its' volume and radius increase. t = time (in seconds) V = volume of the balloon at timet (in cm) T= radius of the balloon time t (in cm) Restate the following sentence in terms of the above variables: "How fast is the radius changing when the radius is 7 cm, if the balloon is being filled with air at a constant rate of 3 cm /s?" (Note: You do not need to solve the problem. Only determine what the question is asking, mathematically.) O What is if we know that r=7 and V 3? O What is . given that r= 7 and 3? O What is when r 7. if 3? O What is , if we know that r 7 and 3? O What is when r = 7. given that 4 3?