Suppose 4x + 9y" = 100, where x and y are functions of t. (a) If dy = L, find when x = 4 and y = 2. dt dt dx dt (b) If X = 3, find y when x = -4 and y = 2. dt dt dy dt Need Help? Read It 21. [-/1 Points] DETAILS SCALCETOM 3.9.007.MI. MY NOTES ASK YOUR TEAC A cylindrical tank with radius 7 m is being filled with water at a rate of 3 m/min. How fast is the height of the water increasing (in m/min)? m/min Need Help? Read It Watch It Master It Submit Answer 22. [-/1 Points] DETAILS SCALCETOM 3.5.029. MY NO Use implicit differentiation to find an equation of the tangent line to the curve at the given point. x2/3 + y2/3 = 4, (-3V3, 1 (astroid)