A concrete foundation for a building has the shape of a rectangular prism. The foundation is 15 yards long, 10 yards wide, and 3 yards high. If concrete costs $3 per cubic yard, how much did the concrete cost for the foundation?

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.