An anthropologist has uncovered a ruin with many ancient artifacts. He plans on giving them to a museum that already has a collection of 25 similar artifacts. After his donation, the museum has 51 artifacts. How many total artifacts did the anthropologist find?

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