The year the Greek city of Helike disappeared is -1/5 times the year the US civil war ended. Let w represent the year the war ended. write an expression in terms of w to represent the year of helike's disappearance

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

How do you convert 1.27 to a percentage

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers