Ajar has five different colors of gum balls in it. blue gum balls comprise 20% of the total number of candy. there are 10 more green gum balls than the blue ones. there are half as many red gum balls as blue ones. the ratio of the number of red gum balls to the number of yellow gum balls is 4: 7. if the remaining 27.5% of the gum balls are white and one fifth of them were replaced by yellow ones, how many yellow gum balls are there?

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 solve a question like this?

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