If two events a and b are independent and you know that p(a) = 0.75, what is the value of p(a | b)?

The functions q and r are defined as follows. q(x)= -2x+2 r(x)= x^2 - 1 find the value of r(q(

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?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents