David is filling a spherical water ball with water for an experiment. If the ball has radius of to the nearest cubic inch 2 3/4 inches , how much cubic inch of water is needed to completely fill the ball? Round the answer to the nearest inch (Volume of a sphere =4/3pie radius 3)

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

You draw a card at random from a deck that contains 33 black cards and 77 red cards.

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?