Abook case is to have 4 shelves including the top, the width is to be 13 feet less than 4 times the hieght, find the width and the height if the carpenter expects to use 20 feet of lumber to make it

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 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 cone is v = 1 3 πr2h.)

41/2 - 1 1/3 what is the answer as a fraction?

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)