Fifteen over eight plus two over five plus negative seven over eight

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?

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.