put the number eight million, two hundred eleven thousand, four hundred nine into the place value chart, then write the number in standard and expanded form.

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 vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

The acceleration of an object due to gravity is 32 feet per second squared.what is acceleration due to gravity in inches per second squared?