Add the following binary numbers 101 and 111 in base 2

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters

What is the total surface area of the square pyramid

The least common multiple is the multiple, other than 0, common to sets of multiples.