Mark is 5.5 feet tall. (5'6") When standing outside, he notices his shadow is the exact length of the side of his pool, which is 15 feet long. At the same time, a tree in the garden has a shadow that reaches all the way to the porch, a distance of 30 feet. how tall is the tree?

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected