A ladder, 500 cm long, leans against a building. If the angle between the ground and the ladder is 57 degrees. How far from the wall is the bottom of the ladder?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?