Bella is working on the world record for longest beaded necklace. she has 10,000 glass beads that have a diameter of 0.4 cm. if she strings these beads end to end, how long will her necklace be?

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