Two boys can paint a fence in 7 hours. Two girls can paint the same fence in 5 hours. In the unlikely event that they can work at the same pace together, how long would the four people working together take to paint the same fence? (Round your answer to the nearest tenth.)

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 measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Which of the following scenarios demonstrates an exponential decay