Mason medical supply Co. sold 631 ECG machine in 2013 and 877 Ecg Machines in 2014. Calculate the in crease sales

Do 12/14 and 8/10 have the same value? explain your answer.

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?

Need on this geometry question. explain how you did it.