What sales tax, at a rate of 5%, must you pay on the purchase of a computer hard drive that costs $229?

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?

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.