Determine the exact value for cos (11π/6)

Write 17/20 as a decimal and as a percent.

What properties allow transformation to be used as a problem solving tool

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?