Three people are sitting on a bus. justin is seated 8 feet directly behind maria and 3 feet directly left of tristan. how far is maria from tristan? round to the nearest tenth.

Megan and desmond each add the same amount of water to their aquarium megan makes 5 ml of chemical solution with every gallon of water for her aquarium desmond mixed 8 ml of chemical solution for every 2 gallon of the water for his aquarium.