Damian goes to a store an buys an item that costs xx dollars. He has a coupon for 20% off, and then a 9% tax is added to the discounted price. Write an expression in terms of xx that represents the total amount that Damian paid at the register.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Andy wants to find the distance d across a river. he located points as shown in the figure, then use similar triangles to find that d = 223.5 feet. how can you tell without calculating that he must be wrong? tell what you think he did wrong and correct his error. round your answer to the nearest tenth if necessary. andy must have used the wrong . the distance d is actually feet.

Asugar cube is inch on each edge. how much volume does it occupy?