Justify Conclusions Tanya and Paco are making a game for the school carnival. They cut out and remove three congruent circles from the rectangular board shown at the right. What is the area of the board after the circles are removed? Explain.
Mrs. Delgado stores cookies in a pyramid-shaped jar that is 12 inches high and has a square base with side lengths of 14 inches. Find the volume of the jar. Round to the nearest tenth.
Jess bought a pyramid-shaped crystal. The rectangular base of the crystal measures 9 centimeters by 8 centimeters and has a slant height of 12 centimeters. What is the surface area of the crystal?