Originally Posted by

**claybird** I have about 20 related rate problems that I just cannot get a grasp on. (Headbang) I'll post a couple, and anyone who can show me how to work them would be greatly appreciated. I think if I can see a couple worked out, I can get the rest of them alright.

2. A sphirical balloon is inflated at a rate of 16 cubic feet per minute. How fast is the radius of the balloon changing at the instant the radius is 2 feet?

Thanks for all the help; for some reason this stuff just doesn't click.:confused: