What is 26633646376+63761876784

Chemistry balance then what type of reaction are they i don't know why it keeps saying math when i put chem

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

To make a monster appear large in a movie, a human actor wore a costume and walked through a scale model of a city. the scale used was 1 inch = 15 feet. the actor is 60 inches tall. how tall does the monster appear in the movie? question 5 options: 720 feet 75 feet 4 feet 900 feet