Form a quadratic polynomial with -81 and 3 as product of zeroes and one of the zeroes respectively.

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?

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Can someone me with these two circle theorem questions asap?