There are 3 children in a family. each is 3yeara older than the next and the sum of their age is 21. how old is each child

The polynomial function of least degree with a leading coefficient of 1 is: f(x) = x3 + ax2 + bx + c

What kind of bond pays interest which is exempt from tax?

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?