.-... ..._.___....__..... ._ _..._ ... V... _--._. 1. [l1 Points] LARCALC11 2.6.017.Mi. ASK YOUR TEACHER At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 6 cubic feet per minute. The diameter of the base of the cone is approximately three times the altitude. At what rate is the height of the pile changing when the pile is 12 feet high? (Hint: The formula for the volume of a cane is v = nrzh.) h' : ft/min 2. [0/1 Points] ASK YOUR TEACHER PREVIOUS ANSWERS LARCALC11 3.1.017.MI. Find the critical numbers of the function. (Enter your answers as a comma-separated list.) f(x) = 4x2 , 6x X pie i 4, 3. [1/1 Points] ASK YOUR TEACHER PREVIOUS ANSWERS LARCALC11 3.1.023. Find the absolute extreme of the function on the ciDSed interval. fiX) : 9 x. {3. 11 hd Caminu San Sebaslin 3,m4a