Is the sum of .75 and -2.25 a rational number or irrational

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

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: