Select whether the number is rational, irrational, or imaginary.
3/11
rational
irrational
imaginary

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.)

Find the cosine function that is represented in the graph.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?