10. What is the area of the region enclosed by the graph of
y2 = x + 1 and y2 = -x+1​

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

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?

Standard deviation of 19,29,21,22,23