What is the correct expansion of the binomial (x+y)^5

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.)

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

How to simply and write the answer n a whole number