Find the area of a sector that has a central angle of 40 and a radius of 2 cm. round your answer to the nearest 100th. use 3.14=

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.)

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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