What is always bother you but you cant get rid off?

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

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?

The trigonometric ratios sine and secant are reciprocals of each other