Complete the statement
1.) three eights times something equals 1
2.) seven times something equals 1
3.) three divided something equals 36
4.) four nines divided something equals 12

Can someone check my answer? you

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

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?