Can someone me on question 1 2 3 4 5

Which ratio is equivalent to 10: 85

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

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?