The in is -5 the out for 7 is -21 the out for -3 is 9the infor 15 is -5 the out for -10 is 30
The most likely measurement for a two-story building would be 20 feet. 6 inches, 25 inches, and 6 feet all are way too short for a two-story building.
It’s A) simplify it you’ll get -42 because a negative times a positive is an negative
there is not enough info given to tell how long it would take
