Suppose that z = f(x, y) and that both x and y are functions of a single variable t such that ∇f(x, y) = x 2 , y 2 i and dx dt = dy dt = t 2 − 4. For what values of t in the interval [0,[infinity]) is z increasing

Someone answer asap for ! 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