The volume of a cylinder, given by the formula v= pie ^2 h, is 539 cubics inches. in the formula, r represents the radius and h represents the height of the cylinder. what equation represents the value of r in terms of h

Can somebody me out with this question

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

Free points also plz look my profile and answer really stuff