Which figure(s) could represent the outcome of a reflection of a unit square?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

One hectometer is a) 1/1000 of a meter. b) 1/100 of a meter. c) 10 meters. d) 100 meters. e) 1000 meters.