What is 70% of 120?
what is 25% of 66?

How do i do this? i don’t understand

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?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?