The first commercial passenger elevator, invented by Elisha Otis, was installed on March 23 of the Mystery Year. This warm-up addresses rate, measurement conversions, dimensional analysis, and multiplicative comparisons. Your Zip download includes printable/digital PDFs:1-page printable Student Puzzle, also prepped for Easel1-page Answer Key with sample solutions1-page version of puzzle with expanding form fields – use with Acrobat Reader A complete file including the student puzzle, answer key,