The radius of Circle Upper A is 3 cm. The radius of Circle Upper B is 4 cm greater than the radius of Circle Upper A. The radius of Circle Upper C is 4 cm greater than the radius of Circle Upper B. The radius of Circle Upper D is 3 cm less than the radius of Circle Upper C. What is the area of each circle? How many times greater than the area of Circle Upper A is the area of Circle Upper D?

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:

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?