For Mrs. Robinson to use the prism to fill the pyramid, she needs to fill the prism 3 times.
Volume is the amount of space occupied by a three dimensional shape or object.
For a pyramid and prism with the same height and base, the volume of the pyramid is one third the volume of the prism.
Hence, for Mrs. Robinson to use the prism to fill the pyramid, she needs to fill the prism 3 times.
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