OMG I REALLY NEED YOUR HELP PLEASE!! my question is Triangles ABC and DEF are similar. Find the length of EF. (Express your answer in two decimal places)

And the other question is
Triangles ABC and DEF are similar. Find the length of DF. (Express your answer in two decimal places) they have both the same images PLEASE HELP ME IM LITERALLY BEGGING YOU PLEASE!

Which ratio is equivalent to 10: 85

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:

Find the pattern and use it to list the nth term in the sequence. 6, 12, 20, 30, 42, 56, the nth term of the sequence is