There are 90 new houses being built in a neighborhood. last month, 13 of them were sold. this month, 15 of the remaining houses were sold. how many houses are left to be sold?

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.)

What is a rational number between 9.5 and 9.7

10% of 1,900,000. show me how you got the answer