What are the solutions of 4x^2-8x+5=0

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?

If i had 1234 apples and 1 banana what is the total amount

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates