Rules for exponents ? (x^a)^b a. 1 b. x^a+b c. x^a y^b d. 1/x^a e. x ^a*b

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?

How do i simply this radical expression?

Using the rise/run counting method, the slope of the line is