Celia built a model pyramid out of foam her model is 20 inches high with a rectangular base that is 8inches wide what is the volume of her model in cubic inches

To find the volume of a pyramid, you need to multiply the area of the base by the height and then divide by 3.

The area of the rectangular base = length x width
= 20 inches x 8 inches
= 160 square inches

Volume = (area of the base x height) / 3
= (160 square inches x 20 inches) / 3
= 3200 cubic inches / 3
= 1066.67 cubic inches

Therefore, the volume of Celia's model pyramid is approximately 1066.67 cubic inches.